The P and p, and Q and q alleles are completely dominant and recessive, and there are no interactions between genes P and Q. What phenotypic ratio would you expect in the F₂?

Biology: The Unity and Diversity of Life (MindTap Course List)
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Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
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Chapter13: Observing Patterns In Inherited Traits
Section: Chapter Questions
Problem 7GP: Several alleles affect traits of roses, such as plant form and bud shape. Alleles of one gene govern...
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Explain this to me please.
The P and Q genes of a plant are 20 m.u. apart. A PP
QQ and a pp qq individual cross, and the F₁ cross with
each other to produce the F2.
The P and p, and Q and q alleles are completely
dominant and recessive, and there are no interactions
between genes P and Q. What phenotypic ratio would
you expect in the F₂?
16 P- Q- 66 P- qq :9 pp Q- :9 pp qq
:
1 P-Q-1 P- qq : 1 pp Q: 1 pp qq
66 P- Q-9 P- qq : 9 pp Q-:16 pp qq
O 9 P-Q- : 3 P- qq: 3 pp Q: 1 pp qq
O 74 P-Q-:5 P- qq: 5 pp Q-:16 pp qq
Transcribed Image Text:The P and Q genes of a plant are 20 m.u. apart. A PP QQ and a pp qq individual cross, and the F₁ cross with each other to produce the F2. The P and p, and Q and q alleles are completely dominant and recessive, and there are no interactions between genes P and Q. What phenotypic ratio would you expect in the F₂? 16 P- Q- 66 P- qq :9 pp Q- :9 pp qq : 1 P-Q-1 P- qq : 1 pp Q: 1 pp qq 66 P- Q-9 P- qq : 9 pp Q-:16 pp qq O 9 P-Q- : 3 P- qq: 3 pp Q: 1 pp qq O 74 P-Q-:5 P- qq: 5 pp Q-:16 pp qq
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