Wingless fruit Winged fruit

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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. In nature, the plant Plectritis congesta is dimorphic for
fruit shape; that is, individual plants bear either wingless
or winged fruits, as shown in the illustration.
Wingless fruit Winged fruit
Plants were collected from nature before flowering
and were crossed or selfed with the following results:
Number of progeny
Pollination Winged Wingless
Winged (selfed) 91 1*
Winged (selfed) 90 30
Wingless (selfed) 4* 80
Winged × wingless 161 0
Winged × wingless 29 31
Winged × wingless 46 0
Winged × winged 44 0
*Phenotype probably has a nongenetic explanation.
Interpret these results, and derive the mode of
inheritance of these fruit-shaped phenotypes. Use
symbols. What do you think is the nongenetic
explanation for the phenotypes marked by asterisks in
the table?

Wingless fruit
Winged fruit
Transcribed Image Text:Wingless fruit Winged fruit
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