Monohybrid Cross Problem Set

Problem 1: The Monohybrid Cross

In pea plants, spherical seeds (S) are dominant to dented seeds (s). In a genetic cross of two plants that are heterozygous for the seed shape trait, what fraction of the offspring should have spherical seeds?

A. None
B. 1/4
C. 1/2
D. 3/4
E. All

The Biology Project
Department of Biochemistry and Molecular Biophysics
University of Arizona
Thursday, October 1, 1998
Revised: November 2004
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