44. What fraction of the purple-flowered F2 progeny, when selfed, do you expect to produce the same 9:7 ratio of purple to white progeny? А. О В. 1/3 С. 4/9 D. 1/2 Е. 5/9

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
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44

In questions 42 to 44, you have two true-breeding strains of pea plants with white
flowers. Crossing these two strains yields an F1 generation that only has purple
flowers. Self-crossing these purple flowered plants yields the following ratio of
progeny with purple and white flowers: 9 purple: 7 white.
42. How many genes in this cross are involved in determining flower color?
A. 0
В. 1
С. 2
D. 3
Е. 4
43. What fraction of the purple-flowered F2 progeny do you expect to produce only
purple progeny when self crossed?
А. 1/9
В. 1/4
С. 1/3
D. 4/9
Е. 1
44. What fraction of the purple-flowered F2 progeny, when selfed, do you expect to
produce the same 9:7 ratio of purple to white progeny?
А. О
В. 1/3
С. 4/9
D. 1/2
Е. 5/9
Transcribed Image Text:In questions 42 to 44, you have two true-breeding strains of pea plants with white flowers. Crossing these two strains yields an F1 generation that only has purple flowers. Self-crossing these purple flowered plants yields the following ratio of progeny with purple and white flowers: 9 purple: 7 white. 42. How many genes in this cross are involved in determining flower color? A. 0 В. 1 С. 2 D. 3 Е. 4 43. What fraction of the purple-flowered F2 progeny do you expect to produce only purple progeny when self crossed? А. 1/9 В. 1/4 С. 1/3 D. 4/9 Е. 1 44. What fraction of the purple-flowered F2 progeny, when selfed, do you expect to produce the same 9:7 ratio of purple to white progeny? А. О В. 1/3 С. 4/9 D. 1/2 Е. 5/9
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