Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 15 - 15.5 - Concept Check - Page 311: 1

Answer

Genomic imprinting by methylation turns off one copy of certain genes to provide the critical dose, as does X-inactivation in female mammals which turns off one whole X chromosome.

Work Step by Step

Review this chapter and earlier material on genetics for mechanisms that turn off one of the two copies of a gene in some diploid organism. The two cited in the answer are the best known examples.
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