Dihybrid Cross

Problem 5: A SsYy x ssyy test cross.

Tutorial to help answer the question

Which of the following genotypes would you not expect to find among the offspring of a SsYy x ssyy test cross:

Alleles of parent 1

There are four combinations of alleles in the gametes from partent 1.

Alleles of parent 2

There is only one possible combination of alleles in the gametes from parent 2.

Test Cross

This cross can be used to determine if this spherical yellow seeded plant was heterozygous for either the seed shape or seed color trait.

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