Biology: How Life Works
Biology: How Life Works
3rd Edition
ISBN: 9781319017637
Author: James Morris, Daniel Hartl, Andrew Knoll, Melissa Michael, Robert Lue, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: Macmillan Higher Education
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Chapter 14.5, Problem 13SAQ
Summary Introduction

To determine:

The differences between mutagens that are environmental and mutations that are not directed by the environment.

Introduction:

The mutations are the random changes occurring in the structure of DNA (deoxyribonucleic acid). The mutations lead to the change in genotype and may also change the phenotype of an organism.

Expert Solution & Answer
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Explanation of Solution

The agents that have the potential to cause permanent changes in the genetic structure of an organism are called mutagens. The mutants can be physical, chemical, or biological. The chances of occurrence of mutations increase by equal to or more than hundred due to the mutagens. The mutagens those are environmental are ionizing radiation, various chemicals, and many microbial organisms.

The mutations are the sudden events occurring in nature without the direction of the environment. The mutation does not occur for the need of an organism that will be helpful for their survival in the environment. The mutations can be harmful or neutral to organisms. Sometimes the mutations can be positive for the organisms that will be passed on to the further generations.

Conclusion

The mutations are not driven by the environment, they occur randomly. The rate of mutations is increased by the environmental mutagens.

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