Biology (11th Edition)

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

Chapter 41 - Plant Reproduction - Figure 41.30 - Inquiry Question: 1

Answer

Since HOBBIT is wildtype and monopteros is mutant, no proper root forms since monopteros, acting first, is not active and thus does not allow for a normal root to form.

Work Step by Step

Realize that in double mutants, if one gene acts before the other and is a mutant, only the mutant phenotype is seen since the second-acting gene needs the first gene to have had its proper effect before it can, in turn, act.
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