Dihybrid Cross

Problem 3: A genetic cross yielding a 9:3:3:1 ratio of offspring.

Which of the following genetic crosses would be predicted to give a phenotypic ratio of 9:3:3:1?

A. SSYY x ssyy

B. SsYY x SSYy

C. SsYy x SsYy

D. SSyy x ssYY

E. ssYY x ssyy

The Biology Project
University of Arizona
Tuesday, August 13, 1996
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