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SAT® Subject Test in Biology

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Genotype Determination

SATBIO-KE3JYK

In tomato plants, red skin color (R) is dominant to yellow skin color (r). A red-skinned tomato plant was crossed with a yellow-skinned tomato plant, and the following proportion of F1 offspring resulted: 79 red-skinned tomatoes, 68 yellow-skinned tomatoes.

What were the genotypes of the P generation?

A

RR and rr

B

Rr and RR

C

Rr and Rr

D

Rr and rr

E

The P generation cannot be determined from the information given.