Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 20 - Genes Within Populations - Figure 20.15 - Inquiry Question: 1

Answer

Changing to select for positive phototropism would result in the slope of the line increasing/a rising tendency of fruit flies to move toward the light.

Work Step by Step

Selection for negative phototropism led to more movement away from light, so reversing the selection pressure would, logically, reverse the outcome.
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