Answer
d
Work Step by Step
Continuous variation occurs when several genes influence one trait, a concept called epistasis. Skin color and height are traits that display continuous variation. Height and skin color can be graphed as a bell curve.
Biology: The Unity and Diversity of Life (14th Edition)
by Starr, Cecie; Taggart, Ralph; Evers, Christine; Starr, Lisa
Published by
Brooks/Cole Publishing Co.
ISBN 10:
1305073959
ISBN 13:
978-1-30507-395-1
Chapter 13 - Self-Quiz - Page 214: 13
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