Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 24 - Genome Evolution - Review Questions - Understand - Page 496: 6

Answer

A.

Work Step by Step

Most duplicates are turned off (A.) since they are not needed and the extra copies can imbalance gene expression. B. and D. can happen but are rare, not true for most genes as the question refers to. C. is even rarer and not the usual source for lateral transfer, when it does happen.
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