Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 13, Problem 3VCQ
Figure 13.6 Which of the following statements about nondisjunction is true?
- Nondisjunction only results in gametes with n+1 or n-1 chromosomes.
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Chapter 13 Solutions
Biology 2e
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- Nondisjunction can be caused by ________. a. crossing over in meiosis b. segregation in meiosis c. failure of chromosomes to separate during meiosis d. multiple independent assortmentsarrow_forwardBecause of the ________ alignment of homologous chromosomes during meiosis, gametes can end up with _________ mixes of maternal and paternal chromosomes. a. unvarying; different b. unvarying; duplicate c. random; duplicate d. random; differentarrow_forwardWhich of the following is true of a species that has a chromosome number of 2n=16? The species is diploid with 32 chromosomes. There are 8 homologous pairs. A gamete from this species has 4 chromosomes. The species has 16 sets of chromosomes. At the end of meiosis I there will be 8 sister chromatidsarrow_forward
- Which of the following is NOT a function of meiosis? cause an organism to grow create genetic variability reduce the chromosome number in gametes keep chromosome number constant from one generation to the next All of the above are functions of meiosisarrow_forwardWhich of the following differentiates meiosis from mitosis? mitosis is used for the repair of cells, whereas meiosis creates cells for sexual reproduction. In mitosis four identical daughter cells are produced, whereas two genetically different cells are produced in meiosis meiosis is a form of asexual division, whereas mitosis is a form of sexual division mitosis occurs in prokaryotic cells, whereas meiosis occurs in eukaryotic cellsarrow_forwardHow would the mutation of a single chromosome in metaphase 1 of meiosis affect the process of meiosis? Use a simple cell with two chromosomes, what is the ratio of gametes with the mutation vs without the mutation?arrow_forward
- The following image shows one specific stage of meiosis. Which of the following correctly states what is occurring in this stage? A. Microtubules have begun to pull sister chromatids apart, pulling them toward the poles of the cells. There are two cells at this stage. B. Microtubules have begun to pull homologous chromosomes apart, pulling them toward the poles of the cell. There is only one cell at this stage. C. Microtubules have attached to the chromosomes. Homologous chromosomes are aligned at the midpoint of the cell. There is only one cell at this stage. D. The chromosomes have reached the poles of the cell. There are technically two cells, but cytokinesis has begun in each.arrow_forwardNondisjunction is when chromosomes do not separate correctly in anaphase. Nondisjunction in meiosis II produces A. two cells with too many chromosomes and two cells with too few chromosomes. B. two cells with the correct number of chromosomes and two cells with too many chromosomes. C. two cells with too many chromosomes; one with too many chromosomes and one with the correct number of chromosomes. D. two cells with the correct numbers of chromosomes; one cell with too many chromosomes and one cell with too few chromosomes.arrow_forwardList 2 events that occur during the process of meiosis that lead to genetically unique daughter cells (gametes).arrow_forward
- Which of the following statements is an incorrect description of the processes of mitosis or meiosis in a diploid organism? Multiple choice (one asnwer is correct) 1.Crossing over of chromosomes takes place in meiosis I but not in mitosis. 2.Sister chromatids separate in mitosis, and homologous chromosomes separate in meiosis II. 3.None of the above 4.Meiosis II occurs in a haploid cell, while mitosis occurs in diploid cells. 5.Homologous chromosomes align on the metaphase plate in meiosis I but not in mitosis.arrow_forward. Four of the following events are part of both meiosis andmitosis, but only one is meiotic. Which one? (1) Chromatidformation, (2) spindle formation, (3) chromosome condensation, (4) chromosome movement to poles, (5)synapsis.arrow_forwardAfter meiosis 1, are the resulting cells haploid or diploid? How can you tell? Group of answer choices 1. haploid; there are no sister chromatids 2. diploid; there are homologous pairs 3. haploid; there are no homologous pairs 4. diploid; there are sister chromatidsarrow_forward
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