Anatomy & Physiology: The Unity of Form and Function, 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073403717
ISBN 13: 978-0-07340-371-7

Chapter 4 - Section 4.4 - Chromosomes and Heredity - Before You Go On - Page 135: 17

Answer

Genetic disease that develops only when two copies of an abnormal gene are inherited from the parents; most genetic diseases are recessive because a parent with only one copy the abnormal gene is a heterozygous carrier without symptoms

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page 130
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