Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 13.4, Problem 1R
Summary Introduction
To review:
The genetic consequences of an unpaired DNA change in the S phase prior to meiosis.
Introduction:
Cell division refers to the row of events that occur within the cell and the cell travels through different phases of the cycle. Cell cycle is segregated into G1 (Gap 1) phase, G2 phase, S-phase, and finally the mitosis or meiosis phase occur.
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How many chromosomes are in a cell during Anaphase 2 of Meiosis?
A cell has 8 chromosomes in metaphase II of meiosis. How many chromosomes and DNA molecules will be present per cell in this same organism at Anaphase II of meiosis ?
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Life: The Science of Biology
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- In kangaroos, the somatic cells are diploid, having 22 chromosomes. How many chromosomes are present in each cell at metaphase II of meiosis?arrow_forwardWhy is it necessary for the chromosomes to condense during mitosis and meiosis? What do you think might happen if the chromosomes were not condensed?arrow_forwardA cell has 8 chromosomes in metaphase II of meiosis. How many chromosomes and DNA molecules will be present per cell in this same organism at Metaphase I of meiosis?arrow_forward
- What role does DNA play in meiosis?arrow_forwardHuman cells normally have 46 chromosomes. For each of the following stages, state the number of chromosomes present in a human cell: 1. Metaphase of mitosis 2. Metaphase I of meiosis 3. Telophase of mitosis 4. Telophase I of meiosis Telophase II of meiosisarrow_forwardIn which behaviour of chromosomes do mitosis and meiosis differ from each other? In meiosis, homologous chromosomes lie in pairs but don't cross over; whereas, in mitosis, chromosomes remain separate and undergo crossing overr. In meiosis, homologous chromosomes don’t lie in pairs and don't undergo crossing over; whereas, in mitosis, chromosomes lie in pairs and get crossed over. In mitosis, chromosomes, as a whole, move towards the opposite poles; whereas, in meiosis I, chromatids move towards the opposite poles. In meiosis, homologous chromosomes lie in pairs, and form chiasmata; whereas, in mitosis homologous chromosomes dont undergo synapsis or crossing over.arrow_forward
- What are the major differences between mitosis and meiosis? Explain this both in terms of the different steps of each event and with regards to the final products of each event. Remember to mention the events which are unique to meiosis and why they are significant.arrow_forwardIf there are 4 chromosomes in the parent cell, how many chromosomes will there be in the daughter cells after mitosis? After meiosis?arrow_forwardDogs have 78 chromosomes in their diploid cells. If a diploid dog cell enters meiosis, how many chromosomes and chromatids will be present in each daughter cell at the end of meiosis I?arrow_forward
- From this point on, meiosis is very similar (but not exactly similar) to what happened in mitosis. How many copies of each type of chromosome end up in the daughter cells of meiosis when it is complete?arrow_forwardThe period between meiosis I and meiosis II is called interphase II.Does DNA replication take place during interphase II?arrow_forwardDoes Interphase occur before or after meiosis?arrow_forward
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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