A red flowered plant is crossed with a white flowered plant. All of the F1 plants...
A red flowered plant is crossed with a white flowered plant. All of the F1 plants produce red flowers. When the F1 plants are allowed to self-pollinate, 389 of the F2 plants have red flowers and 141 have white flowers. What are the genotypes of the parental and F1 generation plants?
A. P:Red = RR, white = rr; F1 = Red RR and Rr
B. P:Red =Rr, white = rr; F1 = Red Rr and rr
C. P: Red = RR, white = rr; F1 = Red Rr only
D. P: Red = Rr, white = rr; F1 = Red Rr only
Homework Answers
Option A
Parents = RR (red) × rr (white) = F1 = Rr (red)
Selfing of F1 = Rr × Rr
| Gametes | R | r |
| R | RR (red) | Rr (red) |
| r | Rr (red) | rr (white) |
F2 = RR, Rr = red, rr = white
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