Biology: The Dynamic Science (Mind...

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

Biology: The Dynamic Science (Mind...

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


Chapter 1.2, Problem 2SB
Textbook Problem

How do random changes in the structure of DNA affect the characteristics of organisms?

Expert Solution
Summary Introduction

To review:

The methods through which the random changes in structure of DNA (deoxyribonucleic acid) affect characteristics of an organisms.


The neutral theory of molecular evolution focuses on evolution at the molecular level. It states that there are mainly three elements that are concerned with the evolution of DNA (deoxyribonucleic acid) and proteins. These elements include mutations, purifying selection, and random genetic drift.

Explanation of Solution

The term mutation can be defined as the change, which is permanent in the sequence of the nucleotides present in the DNA. The mutation leads to the alteration in the genome of the organism, extrachromosomal DNA or the virus. The most common reasons for the mutations are replication errors, malfunctioning of the repair machinery, transposable elements, and ionic or nonionic radiations...

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Chapter 1 Solutions

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