Biology: How Life Works
3rd Edition
ISBN: 9781319017637
Author: James Morris, Daniel Hartl, Andrew Knoll, Melissa Michael, Robert Lue, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: Macmillan Higher Education
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Chapter 11.4, Problem 11SAQ
Summary Introduction
Errors during the process of mitosis and meiosis (meiosis I and II) can result in extra or missing chromosomes in cells. These errors occur infrequently and most of them may produce lethal effects. Nondisjunction in meiosis may lead to extra or missing chromosomal DNA.
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If nondisjunction occurs during meiosis I, how many of the daughter cells will have an incorrect number of chromosomes after meiosis I and meiosis II are complete?
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How 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?
In a comparison of the stages of meiosis to the stages of mitosis, which stages are unique ... to meiosis and which stages have the same events in both meiosis and mitosis?
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- In the following diagram, designate each daughter cell as diploid (2n) or haploid (n).arrow_forwardNondisjunction 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_forwardCompare meiotic anaphase I with meiotic anaphase II. Which meiotic anaphase is most similar to the mitotic anaphase?arrow_forward
- The part of meiosis that is similar to mitosis is_______. a. meiosis I b. anaphase I c. meiosis II d. interkinesisarrow_forwardSeveral cells like the one represented below undergo a normal meiosis I and meiosis II, so that each cell produces four daughter cells. One or more of these daughter cells are shown below. Which one(s) could they/could it be? a) b) c) d)arrow_forwardHow can duplications arise? A. by uneven crossing over during meiotic prophase B. by the loss of a telomere C. by chromosome breakage and exchange of arms D. by spindle failure during chromosome separationarrow_forward
- What would happen to the chromosome number in gametes and offspring if gametes were formed by the mitotic process instead of the meiotic process?arrow_forwardA) At the end of meiosis I, how many chromosomes are in each cell? B) Are the cells haploid or diploid? C) Are the chromosomes of the meiosis I products replicated or nonreplicated? D) During which phase in meiosis I would crossing over have occurred?arrow_forwardWhich statement best describes the genetic content of the two daughter cells in prophase II of meiosis? A. Haploid with one copy of each gene B. Haploid with two copies of each gene C. Diploid with two copies of each gene D. Diploid with four copies of each gene E. tetraploid with four copies of each genearrow_forward
- A) Hoe many cells are produced by the end of meiosis II? B) Are the cells produced at the end of meiosis II haploid or diploid? C) Are the chromosomes of the four final meiotic products replicated or nonreplicated?arrow_forwardWhat is something that occurs in prophase 1 of meiosis but not mitosis? How does this affect the end result of meiosis?arrow_forwardAn important function of meiosis is to reduce the chromosome number to exactly half.How is this done? What makes such a process necessary?arrow_forward
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The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY