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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 6QP
Textbook Problem
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Discuss the following sets of terms:

  1. a. trisomy and triploidy
  2. b. aneuploidy and polyploidy

a.

Summary Introduction

To explain: The terms trisomy and triploidy.

Introduction: Chromosomal abnormalities are common in humans nowadays. Genetic history and reproductive failures are the main causes of such abnormalities. A normal human being has 23 pairs of chromosomes. Those who have more or less than 23 pairs have such chromosomal abnormalities.

Explanation of Solution

  • Trisomy:
  • • Trisomy is a condition in which an individual has an extra copy of a chromosome.
  • • The individual has 47 chromosomes (22+XXX or 22+XXY).
  • • The individual remains diploid but not normal due to the presence of extra genes.
  • • Trisomy occurs in both plants and animals
  • • It causes an imbalance in the gene products, which further have an impact on the physiological properties.
  • • Down syndrome is an example of trisomy in which an extra chromosome is present on chromosome number 21...
Summary Introduction

To describe:  The terms aneuploidy and polyploidy.

Introduction: Chromosomal abnormalities are common in humans nowadays. Genetic history and reproductive failures are the main causes of such abnormalities. A normal human has 23 pairs of chromosomes. Those who have more or less than 23 pairs have such chromosomal abnormalities.

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