Monohybrid Cross Problem Set

Problem 2: Mendel's First Law

A phenotypic ratio of 3:1 in the offspring of a mating of two organisms heterozygous for a single trait is expected when:

A. the alleles segregate during meiosis.

Mendel first proposed that alleles segregate from one another during the formation of gametes.

B. each allele contains two mutations.

C. the alleles are identical.

D. the alleles are incompletely dominant.

E. only recessive traits are scored.