Biology: Life on Earth with Physiology (11th Edition)
Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 1, Problem 3MC
Summary Introduction

Introduction:

Mutation is defined as the sudden unpredictable change in the sequence of DNA. It results in an alteration in DNA sequence. Mutation is caused by environmental factors such as ionizing and non-ionizing radiation, chemical agents such as sodium azide, bromine and so on.

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Which of the following statements about genes is incorrect? Select one: O a. During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg. b. Genetic differences can result from changes in the DNA called mutations. O c. Genes correspond to segments of DNA. d. Under normal circumstances, each chromosome contains precisely one gene. e. Many genes contain the information needed for cells to synthesize enzymes and other proteins.
A.) DNA encodes for the cell genome and is therefore a permanent copy to have a functioning cell. B.)Different changes to the structure of messenger RNA can cause mutations and genomic instability which could lead to abnormal cells in the body. a. Statement A is correct  b. Statement B is correct c. Both A and B are correct d. Both A and B are incorrect
Hox genes are activated in specific regions of the body (e.g. back of the head) and activate other genes to build specific structures in those regions.  This was largely discovered by looking at the effects of mutants of the various hox genes.  What other technique would provide information on the action of hox genes? Group of answer choices A. copy hox genes and place them in bacteria B. copy hox genes and place them in plants C. completely remove all hox genes from the genome D. change the control of hox genes so that they are expressed in different body regions E. reverse the order of the hox genes on the chromosome

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Biology: Life on Earth with Physiology (11th Edition)

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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY