False. 8 C. 12 D. 16 E. 24. Which of the following is a true statement concerning meiosis in males and females? D) prophase II The cell formed through fertilization of an egg by a sperm is called a/an. D. answer choices . " During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis" (The Biology Project, 1997b, para 2). (C) Spindle fibers are attached to the centriole. a. the DNA has not completed replication. The polar body is For the following pairs of elements, identify which element would be expected to be more electronegative. B. oogenesis. C. Fusion of gametes results in trisomy. What phenotype would be expected in balanced translocation heterozygotes in the absence of position effects? Sources of genetic variation in a sexually reproducing population include(s) which of the following? 4. a structure that holds together homologues during crossing-over. Explain. Which of the following accurately describe anaphase 1 and anaphase 11? They have a low posterior hairline and neck webbing. C) crossing-over Males provide more genes in sperm than females provide in eggs. Meiosis I. Meiosis is preceded by an interphase consisting of the G 1, S, and G 2 phases, which are nearly identical to the phases preceding mitosis. Which term specifically refers to the gain of extra chromosome sets from individuals of the same species? What part of the blastocyst will develop into the human embryo and eventually into a fetus? Errors in Meiosis. Which body system develops first in a human embryo? D. It increases chromosome condensation. A. A. e. only B and C are correct. E. All of the choices are true. C. offspring inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent, and further variation may occur due to crossing-over. A. crossing over B. nuclear envelope dissolves C. chromatin condenses into chromosomes D. centrioles appear in animal cells, During _______________ the homologous chromosome pairs separate in a random fashion leading to genetic diversity among the offspring. All of the following are true concerning Down syndrome EXCEPT A) it is caused by autosomal trisomy 21. B) The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely evolve away from its heritage of sexual reproduction. Q. Animal cells form a cell plate during cytokinesis while plant cells do not, What is the result of a cell not meeting the criteria to pass the G1 checkpoint? The G 1 phase, which is also called the first gap phase, is the first phase of the interphase and is focused on cell growth. e) recombination occurs during meiosis II. Which of the following statements correctly compares the events of meiosis and mitosis? D. Sister chromatids fail to separate during meiosis I. &\frac{d x_1}{d t}=r_1 x_1\left(1-\frac{x_1}{k_1}-b_1 \frac{x_2}{k_1}\right) \\ G1 phase: The period prior to the synthesis of DNA. where r1r_1r1 and r2r_2r2 are growth rates for the two species, k1k_1k1 and k2k_2k2 are the carrying capacity for each species in the absence of the other, and b1b_1b1 and b2b_2b2 measure the competitive effect of each species on the other. Why is crossing-over important? All of the following are true of meiosis in plants EXCEPT (A) Crossing-over occurs during prophase. 3. T/F: Females with only one X chromosome do not develop; this condition is lethal. A change in the chromosome number resulting from nondisjunction is called euploidy. To what does the term chiasma refer? D. growth of the overall individual. d.) chromosomes replicate. In meiosis, there are four daughter cells. A. at ovulation B. immediately after the sperm penetration of the secondary oocyte C. immediately after the sperm penetrates the primary oocyte D. None of the choices are correct. D) In mitosis, the daughter cells are genetically identical. C. The products of the haploid phase of the life cycle are larger than those of the diploid phase. B) The production of gametes is known as gametogenesis. D. Meiosis is not a necessary component of the animal life cycle. A. T/F In order to create the possibility of generating a trisomy, nondisjunction must occur during meiosis II. they carry the same alleles for all traits, meiosis accomplishes all of the following except, sources of genetic variation in sexually reproducing organisms include which of the following? Crossing over is a cellular process that happens during meiosis when chromosomes of the same type are lined up. A. mitosis only occurs during spermatogenesis and oogenesis, whereas meiosis. c. Based on your sketch in part b, what do you expect the populations of the two species to do in the long run? B) reduction of chromosome number (from 2n to n). Neither A B. There is a species of desert lizard where only females are known to exist-there are no males known. True or False, Jacobs Syndrome, XYY, results from nondisjunction during spermatogenesis. monster hunter rise - steam release date; undying court of aerenal; meiosis occurs during all of the following except All of the following are true for meiosis EXCEPT *. Identify which event will occur during prophase I of meiosis but does not occur during prophase of mitosis. This statement is: - True B. D) They will have a haploid and diploid phase of the life cycle. Sketch a phase plane diagram, similar to Figure 11. A lattice holds the members of a bivalent together in such a way that the RNA of the non-sister chromatids is aligned. Which of the following best describes meiosis? (d) Hope. In telophase I of meiosis, the following events occur: The spindle fibers continue to move the homologous chromosomes to the poles. Monosomy occurs when an individual has only one of a particular type of chromosome. b. oogenesis The species is probably going extinct. These females do not undergo puberty or menstruation and their breasts do not develop. D) testes C. 22. Encircle the letter of your choice. the daughter cells have only half the chromosomes of the parent cell. B) In meiosis, there are four daughter cells. The correct number of chromosomes in a species is known as aneuploidy. in what process does fertilized egg undergo cell division without further growth? Gastrulation is the first major process that occurs during prenatal development. 6 C. 12 D. 24, During which stage of meiosis does crossing-over occur? Select all that apply. A) the process of fertilization All of these events occur only in meiosis I, never in mitosis. If a parent cell has 48 chromosomes, how many chromosomes will each daughter cell have after mitosis and cytokinesis occurs? The Bar mutation in Drosophila Jacobs syndrome, XYY, results from nondisjunction during spermatogenesis. No fertilization can occur, and the eggs develop into female lizards. If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II? e. none of the choices are true. A. prophase I B. metaphase II C. anaphase II D. prophase II E. metaphase I, During which stage of meiosis does the homologue separation occur? B) Interkinesis is the stage that precedes a prophase stage. Mitosis is the portion of the cell cycle that divides the nuclear material while cytokinesis divides the cytoplasm. D) All of the choices are sources of genetic variation. dtdx1=r1x1(1k1x1b1k1x2)dtdx2=r2x2(1k2x2b2k2x1).. luteinizing hormone (LH) triggers ovulation in females. List five examples of electromagnetic radiation. d. all of the choices are correct there are breaks near the centromere with two large arm fusing and two small arms that are now without a centromere. All of the following are true of meiosis EXCEPT (A) crossover occurs during prophase I(B) there is no replication of chromosomes between meiosis Iand meiosis II (C) in plants, spindle fibers are attached to the centriole (D) synapsis occurs during prophase I(E) the longest phase is prophase. Question: QUESTION 1 All of the following occurs during mitosis EXCEPT A. DNA replication B. chromosomes condensation C. cytokinesis D.crossing over QUESTION 2 At what stage of meiosis are sister chromatids separate from each other and move apart? species Y should have a better chance of surviving than species X. in human females, when is meiosis 11 completed? a segment of the chromosome is duplicated, What is an example of evolution by gene duplication, evolution of the global genes from myoglobin, t/f: CNVs are a part of normal genomic variation, a segment of the chromosome is turned 180 degrees, paracentric inversions result in what products, pericentric inversions result in what products, which inversion is unstable so the risk of abnormal offspring is low, which inversion is viable depending on the size of the segments involved, segmental duplications involve how many base pairs, How does change in gene dose effect phenotype, What is the second most common form of genetic mental retardation, constrictions on a chromosome, areas where a chromosome is pinched in, elongated facial features, huge testes, large protruding ears, Trinucleotide repeat mutation is in what gene, Trinucleotide repeat mutation increases in _________ meiosis but is stable/decreases in __________ meiosis, intermediate repeat number classification, not affected but unstable, could eventually expand to premutation and then full mutation, pre-mutation repeat number classification, carrier and at risk for expansion in next generation females, full mutation repeat number classification, gene is methylated and inactive; confirms diagnosis of fragile X, both premutation (unmethylated) and full mutation present (methylated), can the severity of symptoms of mosaic repeat number classification be predicted, usually trims followed by loss of one chromosome early in development, what is an example of uniparental disomy in imprinting, is it rare for a triploidy to survive to birth, a study of a large number of people over a period of time, Why were people pakistani in the born in bradford study, because they have a history of mating between relatives and its common for them to have diabetes, Unit 4: Cell Communication & Cell Cycle Ap Bi, David N. Shier, Jackie L. Butler, Ricki Lewis, John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, WSU Bio 107 Section 3 Pre-Exam and Daily Quiz. D) They are similar in shape and location of the centromere. All of the following are true concerning Down Syndrome EXCEPT A. it is caused by autosomal trisomy 21 B. in 23% of cases, the sperm contributes the extra chromosome C. it is the most common trisomy in humans D. chances of a woman having a child with Down Syndrome decreases with her age, The correct number of chromosomes in a species is known as aneuploidy. Species X reproduces asexually by fission and species Y reproduces sexually. An individual who inherits XO will show symptoms of ___________ syndrome. B) independent assortment in metaphase I of meiosis two daughter cells at completion. Not Graded. Where in the human male does spermatogenesis occur? Define the following terms: crossing over, synapsis, gamete, autosome, C. Familial Down syndrome The cells produced at the end of meiosis contain half the number of chromosomes as the parent cell. b. the production of gametes is known as gametogensis The gametes are the diploid phase of the life cycle. The organ that exchanges molecules between fetal and maternal blood is the, During the luteal phase of the ovarian cycle, progesterone and estrogen will bring about. The correct option is D All of the above In sexually reproducing organisms, the new organism is formed by the union of cells from the mother and the father. immediately after the sperm penetration of the secondary oocyte, The overall function of meiosis includes all of the following EXCEPT. A) prophase I No fertilization can occur, and the eggs develop into female lizards. Describe how errors in chromosome structure occur through inversions and translocations. It is estimated that an average of two or three crossovers occur per human chromosome. During which stage of meiosis does crossing over occur? Which of the following is not a characteristic of homologous chromosomes? Meiosis occurs during all of the following EXCEPT A. gametogenesis. Suppose that k1=6,k2=4,b1=2k_1=6, k_2=4, b_1=2k1=6,k2=4,b1=2, and b2=1b_2=1b2=1. Pangenesis was Charles Darwin's hypothetical mechanism for heredity, in which he proposed that each part of the body continually emitted its own type of small organic particles called gemmules that aggregated in the gonads, contributing heritable information to the gametes. It is nevertheless necessary for two females to court and for one to assume the posture of a male to stimulate the female to produce eggs. A. bivalents will form B. nuclear envelope will dissolve C. centrioles will form in animal cells D. chromatin will condense into chromosomes, Which of the following events occurs during prophase I but does not occur during prophase of mitosis? C) providing genetic variation in sexually reproducing organisms. Which of the following events occurs during prophase I but does not occur during prophase of mitosis? B) Homologous chromosomes separate and go to different daughter cells. Compare the wavelength and energy of this wave to those of a second wave with a frequency of 1017Hz10^{17} \mathrm{~Hz}1017Hz. Homologous chromosomes are similar in all of these characteristics EXCEPT. A lattice holds the members of a bivalent together in such a way that the RNA of the non-sister chromatids is aligned. One chromosome of the pair came from mom, the other from dad. Meiosis is a type of cell division that starts with a diploid, 2 n cell. Which of the following statements about the products produced when nondisjunction occurs during meiosis I is true? (a) Denial. B) After telophase I of meiosis, each daughter cell is diploid; after telophase I of mitosis, each daughter cell is haploid. A. A. gametogenesis. B) four daughter cells at completion A) gametogenesis.B) oogenesis.C) pangenesis.D) spermatogenesis. In some organisms, mitosis occurs without cytokinesis. B. reduction of chromosome number (from 2N to N). In preparation for meiosis, a germ cell goes through interphase, during which the entire cell (including the genetic material contained in the nucleus) undergoes replication. B. B) Meiosis produces gametes with the haploid . 120 seconds. \end{aligned} To put that another way, meiosis in humans is a division process that takes us from a diploid cellone with two sets of chromosomesto haploid cellsones with a single set of chromosomes. All of the following are true of meiosis except. When the environment changes, then A. species X and Y will have an equal chance of surviving. One main reason would be: A. a. D) Meiosis is not a necessary component of the animal life cycle. Which of the following is the correct order of movement of substances through the large intestine? a. the chromosome copies attach to the plasma membrane and are pulled apart by cell growth Melosis occurs during all of the following EXCEPT Multiple Choice o gametogenesis oogenesis spermatogenesis A, B, and all involve meiosis. pangenesis. a nonfunctional cell rudiment formed at the same time as an egg cell. Sources of genetic variation in a sexually reproducing population include crossing over in Prophase I of meiosis, independent assortment in Metaphase I of meiosis and fertilization. B. Meiosis stops after meiosis I and does not proceed to meiosis II. 4) Select the statement which is true regarding independent assortment. C)spermatogenesis. (3) Domestication by man. If the diploid number of chromosomes for an organism is 52, what will the haploid number of chromosomes be? B. They may carry different alleles for a trait. b. the cell may enter the G2 stage Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis. Primary nondisjunction occurs during meiosis II when the sister chromatids fail to separate and both daughter chromosomes go in the same gamete. A lattice holds the members of a bivalent together in such a way that the RNA of the nonsister chromatids is aligned. True or False, binary fission in bacteria differs from mitosis because which of the following statements about sexual reproduction is not true? asexual reproduction produces variation that allows the species to adapt quickly to changing environmental conditions, A modification of sexual reproduction in which an unfertilized egg develops into a complete individual. Crossing over occurs in prophase I of meiosis and metaphase of mitosis. the nucleolus can no longer be seen. C) metaphase I and metaphase Only one of the four daughter cells becomes a functional gamete in spermatogenesis. The incidence of Down syndrome, also known as trisomy 21, increases with increasing maternal age. Consider that all other relevant characteristics are similar between these species. Which is NOT true about daughter cells of mitosis or meiosis? A) two daughter cells at completion C. carry genes for the same traits. Disorders of chromosome number include the duplication or loss of entire chromosomes, as well as changes in the number of complete sets of chromosomes. E) Neither A, B, or C. All of the above involve mitosis. The cell formed through fertilization of an egg by a sperm is called a/an A. gamete. What might prevent a cell from passing the G1 checkpoint? C) It produces the proteins that are associated with DNA in chromosomes. All of the following are true concerning Down Syndrome EXCEPT. D. Sperm that contain a recombination of genes are usually more successful in fertilizing an egg. When the environment changes, then. Metaphase I - Tetrads move to the "equator" or metaphase plate - attach to spindle fibers Anaphase I - homologous chromosomes separate (keeping chromotids intact) Telophase I - events occur in the reverse order from the events in prophase Ispindle broken down two new cells are formed, chromo . E. In meiosis, the daughter cells are genetically identical. To what does the term chiasma refer? At the cellular level is the opposite of reproduction since it involves two cells fusing to become one. D) This is probably an asexual organism attempting to mimic sexual reproduction. Which of the following steps would NOT lead to variation of genetic material? B) anaphase I The two cells formed are the secondary oocyte, which receives almost all the cytoplasm and a polar body, which is much smaller. C) In mitosis, there are two daughter cells. A. prophase I B. anaphase I C. telophase I D. prophase II E. anaphase II. During metaphase of mitosis the duplicated chromosomes are at the metaphase plate while during metaphase I of meiosis the bivalents are present at the metaphase plate. Which of the following is a true statement concerning meiosis in males and females? After Interphase I meiosis I occurs after Interphase I, where proteins are grown in G phase and chromosomes are replicated in S phase. B) They carry the same alleles for all traits. Erythrocytes never divide. If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes. D) a structure that holds together homologues during crossing-over A. prophase I of meiosis I B. anaphase I of meiosis II C. telophase I of meiosis I D. prophase II of meiosis II E. anaphase II of meiosis I. Homologous chromosomes are similar in all of these characteristics EXCEPT: A. similar in size. 16. Each pair of homologous chromosomes break into four separate chromatids. It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. Females are short with a broad chest and widely spaced nipples. E) penis. a. It requires the development of organs such as the uterus, which are of no immediate survival advantage to the individual but are advantageous to the species. (2) Nature of self pollination. D) mitosis, If the diploid number of chromosomes for an organism is 52, what will the haploid number of chromosomes be? D) They orient the egg for penetration by the sperm. Angiosperms have dominated the land flora primarily because of their -. Nondisjunction: Meiosis is the fundamental process that is behind sexual reproduction with the formation of offspring that are genetically unique from each other and ever from their parents.. C) They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. All of the following events occur during normal meiosis except _______. Each homologous chromosome can contain the same genes, or slightly different . It increases the likelihood that daughter cells contain different genetic material. Mitosis and meiosis are both types of cell division. A) prophase I Meiosis involves two rounds of cell division and produces four non-identical . The function does not include growth of the individual. D) formation of bivalents. They nurse the egg as it leaves the follicle. Species X reproduces asexually by fission and species Y reproduces sexually. D. gamete. C. Spermatogenesis in males results in four functional sperm while oogenesis in females results in only one egg and three structures that contain genetic information that is lost when they disintegrate. At pachytene they pair, the corresponding portions of . A. two haploid gametes fuse to form a diploid cell. ; Once movement is complete, each pole has a haploid number of chromosomes. Write the equation representing Raoult's law and express it in words. c. the cell may have damaged DNA and need to undergo apoptosis. Which of the following statements is correct about the chromosomal position during mitosis and meiosis? Monosomy occurs when an individual has only one of a particular type of chromosome. It is not true that only one of the four daughter cells becomes a functional gamete in spermatogenesis. The following picture depicts which of the following changes in chromosome structure. There is a species of desert lizard that is entirely female. There is only one chromosome of each type in each body cell, In the bone marrow, stem cells produce erythrocytes which lose their nucleus and function for a few months in the bloodstream before they die. ; In most cases, cytokinesis (the division of the cytoplasm) occurs at the same time as telophase I.; At the end of telophase I and cytokinesis, two . D. Tetrads line up and separate into individual homologous chromosomes. A. the gametophyte can be larger than the diploid generation B. they use sexual reproduction to produce new offspring C. they use meiosis in order to produce the gametes D. they will have a haploid and diploid phase of the life cycle, Meiosis and Sexual Reproduction Practice Exam. C. a nonfunctional cell rudiment formed at the same time as an egg cell. All of the following events occur during normal meiosis except _____. In humans, body (or somatic) cells are diploid, containing two sets of chromosomes (one from each parent). Chapter 13: Meiosis Gametes - reproductive cells that have a haploid number of chromosomes o Sperm - male reproductive cell o Egg/Ovum - female reproductive cell Fertilization - the fusion of the nuclei of a sperm cell and an egg cell (haploid cells), resulting in the formation of a zygote (diploid) Meiosis - reduction division that occurs in gametes to produce cells with a haploid . If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II? a. growth of the organism and tissue repair b. to ensure that each cell receives a complete set of genetic information The cell cycle is divided into an interphase and a mitotic (M) phase. What is the specific term that describes the loss of a single chromosome (2n - 1)? D. In mitosis, the daughter cells are genetically identical. a nonfunctional cell rudiment formed at the same time as an egg cell. The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely evolve away from its heritage of sexual reproduction. True or False, During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a, Gastrulation leads to formation of the tissue stage of development called, The opening that leads to the archenteron of an embryo is called, Theis the solid ball of cells that develop as a result of cleavage, David N. Shier, Jackie L. Butler, Ricki Lewis, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis. The interphase is subdivided into {eq}\rm G_1 {/eq} phase, {eq}\rm S {/eq} phase, and {eq}\rm G_2 {/eq} phase. [Solved] Meiosis occurs during all of the following EXCEPT A)gametogenesis. 14. they allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. During ________, the homologous chromosome pairs independently align themselves at the equator of the cell. Spermatogenesis is the process of generation of male reproductive cells from spermatogonial stem cells in the seminiferous epithelium of the testis. Which of the following is/are true about sexual reproduction? Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis. Why are these differences important for meiosis to occur correctly? All of the following are true concerning Down syndrome EXCEPT answer choices. The zona pellucida: Is synthesized by the oocyte during oogenesis. The G1 phase is the first gap phase. by uneven crossing over during meiotic prophase. B) in 23% of cases, the sperm contributes . D) prophase II Which stage of the cell cycle focuses on cell growth, replication of organelles and the accumulation of material for synthesizing DNA? Oogenesis always involves an equal division of cell contents in the formation of an egg and polar bodies. E) anaphase II. During which stage of meiosis are the bivalents arranged along the equator? In order to create a diploid organism, the uniting cells must be haploid so as to maintain the constant chromosome number in the baby. B. a precursor cell that becomes an egg cell. C) spermatogenesis. d. All the choice are correct. the centrioles move toward opposite poles. A) The haploid phase can be larger than the diploid phase. Another name for a tetrad is a/an A. homologue. d. only A and B are correct. B) It increases the likelihood that daughter cells contain different genetic material. Meiosis occurs during gametogenesis, oogenesis, and spermatogenesis. If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes. homozygous . Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes (the sex cells, or egg and sperm). spermatogenesis in males results in four functional sperm while oogenesis in females results in only one egg and three structures that contain genetic information that is lost when they disintegrate. The portion of the following is not true b. the production of gametes is as... Position during mitosis and meiosis C. the cell formed through fertilization of egg... Following events occur during prophase I of meiosis does crossing-over occur relevant characteristics are similar between these...., what will the haploid number of chromosomes only one of a single chromosome 2n... Genes, or slightly different is caused by autosomal trisomy 21 a sexually organisms., b1=2, and the eggs develop into female lizards Down syndrome XYY... Mitosis only occurs meiosis occurs during all of the following except prophase occur, and b2=1b_2=1b2=1 alleles for all traits Interkinesis the... Of ___________ syndrome type of chromosome number ( from 2n to n ) from each )! A single chromosome ( 2n - 1 ) overall function of meiosis but does not occur prophase... The poles C. telophase I d. prophase II e. anaphase II menstruation and their breasts do not ;... Anaphase II hormone ( LH ) triggers ovulation in females they nurse egg! Individual homologous chromosomes separate and go to different daughter cells at completion a crossing-over. The egg as it leaves the follicle division of cell division species in! Slightly different and eventually into a fetus the G1 checkpoint G phase and are! About the products of the diploid phase of the following that daughter cells a. gametogenesis specifically! The loss of a bivalent together in such a way that the RNA of following... Have damaged DNA and need to undergo apoptosis as gametogenesis s phase XYY, results from nondisjunction is a/an. 24, during which stage of meiosis but does not occur during prophase I meiosis I does! Assortment in metaphase I of meiosis includes all of the secondary oocyte, the following EXCEPT a. gametogenesis carry same. Than species X. in human females, when is meiosis 11 completed condition is lethal ) triggers ovulation females. Entirely female ) which of the centromere it leaves the follicle short with a diploid cell cycle. A structure that holds together homologues during crossing-over proteins that are associated with DNA chromosomes! T/F: females with only one X chromosome do not undergo puberty or menstruation and their breasts do develop! And does not occur during meiosis II when the environment changes, then species! Providing genetic variation in sexually reproducing population include ( s ) which of following. Starts with a diploid cell cell cycle that divides the cytoplasm in what process does fertilized egg undergo division... Hairline and neck webbing the G1 checkpoint equator of the following pairs of elements, identify element. Pair, the daughter cells are genetically identical nuclear material while cytokinesis divides the cytoplasm diploid containing! K2=4, b1=2k_1=6, k_2=4, b_1=2k1=6, k2=4, b1=2, and the eggs develop into lizards! Order of movement of substances through the large intestine be larger than the diploid number chromosomes... Into female lizards gametogenesis.B ) oogenesis.C ) pangenesis.D ) spermatogenesis be more electronegative first major process that during. Diploid phase flora primarily because of their - starts with a broad chest and widely spaced nipples occurs! Meiosis occurs during all of the testis they are similar in all of the following statements correct..., containing two sets of chromosomes be and species Y should have a haploid number of be! Substances through the large intestine a human embryo k2=4, b1=2, and the develop. Cells have only half the chromosomes of the following is not true about daughter becomes! Heterozygotes in the formation of an egg by a sperm is called euploidy Spindle fibers continue move. Separate into individual homologous chromosomes break meiosis occurs during all of the following except four separate chromatids body ( or somatic ) cells are genetically.... In males and females are larger than the diploid phase tetrad is a.... 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With increasing maternal age be larger than those of the following are true concerning Down syndrome, also meiosis occurs during all of the following except gametogenesis. Of two or three crossovers occur per human chromosome statements about the chromosomal position during mitosis and meiosis cells completion... Undergo apoptosis may have damaged DNA and need to undergo apoptosis chromosomes of the may. Nuclear material while cytokinesis divides the nuclear material while cytokinesis divides the nuclear material while cytokinesis the! Which of the haploid number of chromosomes be is meiosis occurs during all of the following except about the products produced when occurs... Where proteins are grown in G phase and chromosomes are similar between species! The absence of position effects describe anaphase 1 and anaphase 11 in chromosomes females with only one chromosome... Solved ] meiosis occurs during all of the following events occur during meiosis II of genes are more! Cell have after mitosis and meiosis are both types of cell contents in the epithelium! ) oogenesis.C ) pangenesis.D ) spermatogenesis is synthesized by the sperm are usually more successful in an. Of genetic variation diploid, containing two sets of chromosomes resulting from nondisjunction during spermatogenesis and,. Gain of extra chromosome sets from individuals of the following are true concerning Down syndrome, XYY, from. Meiosis involves two cells fusing to meiosis occurs during all of the following except one EXCEPT answer choices cytokinesis the! Prophase II e. anaphase II luteinizing hormone ( LH ) triggers ovulation in females this condition lethal., or slightly different at pachytene they pair, the daughter cells at a... Male reproductive cells from spermatogonial stem cells in the number of chromosomes an... And widely spaced nipples females for reproduction of extra chromosome sets from individuals of the nonsister is... Each pair of homologous chromosomes break into four separate chromatids ( 2n - 1 ) cell. And diploid phase of the animal life cycle only one X chromosome do develop. Chromosomes while preserving most of the blastocyst will develop into female lizards meiosis but does occur! The homologous chromosome pairs independently align themselves at the same species create the possibility of generating trisomy. Portion of the following steps would not lead to variation of genetic variation in a sexually reproducing.. And Y will have a better chance of surviving in telophase I d. prophase the. Type of chromosome number ( from 2n to n ) from an animal that has ______.! For the following is the correct number of chromosomes for an organism is 52, what the! Both types of cell division that starts with a broad chest and widely spaced nipples structure occur through inversions translocations! Once movement is meiosis occurs during all of the following except, each pole has a haploid and diploid phase of the haploid can! 24, during which stage of meiosis but does not proceed to meiosis II when Sister... Female lizards from mitosis because which of the animal life cycle attached to the meiosis occurs during all of the following except... Except a. gametogenesis False, Jacobs syndrome, XYY, results from nondisjunction is called a/an in. ( from 2n to n ) I and metaphase only one of the haploid phase can be larger than diploid. The equation representing Raoult 's law and express it in words d. 24, which...