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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052

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BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 6, Problem 14QP
Textbook Problem
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Variations in Chromosome Number—Aneuploidy

Describe the process of nondisjunction and explain when it takes place during cell division.

Summary Introduction

To describe: Nondisjunction and the phase of cell division in which it happens.

Introduction: All livings organisms have a fixed number of chromosomes. This number is maintained in future generations during cell division. In humans, the diploid number is normal in somatic cells and haploid in germ cells. However, sometimes an increase in the number of chromosome set is found in the cells. This condition is called polyploidy.

Explanation of Solution

Polyploidy is the increase in the sets of chromosomes from the normal number. Sometimes instead of a set, the change may involve one or two chromosomes; this is called aneuploidy. The reason for aneuploidy is nondisjunction...

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