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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892
Chapter 10, Problem 13TYK
Textbook Problem
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Discuss Concepts A cell has 38 chromosomes. After mitosis and cell division, one daughter cell has 39 chromosomes and the other has 37. What might have caused these abnormal chromosome numbers? What effects do you suppose this might have on cell function? Why?

Summary Introduction

To review:

The reason behind the abnormal number of chromosomes and the effects of the abnormal number of chromosomes on cell functions according to the case study.

Introduction:

Cell division is defined as the process in which a parent cell divides into 2 daughter cells. There occurs two different phases in the process of cell division, namely, mitosis and meiosis. The number of daughter cells formed are different in each phase.

Explanation of Solution

During the early stages of mitosis, the chromosomes attach themselves to a spindle fiber. These chromosomes along with the spindle, move toward the middle of each daughter cell. The failure of these chromosomes to get attached to the spindle results in the creation of an extra copy or the deletion of chromosomes after a cell divide.

After mitosis, the number of chromosomes become 2n, where n is the number of parent chromosomes. In the given case study, the number of chromosomes in a parent cell are 38 and after mitosis, the number of chromosomes in each daughter cell is 39 and 37. The reason behind the abnormality in the number of chromosomes is the failure of the chromosomal attachment to the spindle before the cell division starts...

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