Monohybrid Cross Problem Set

Problem 10: Disappearance of parental phenotypes in the F1 generation

A genetic cross of inbred snapdragons with red flowers with inbred snapdragons with white flowers resulted in F1-hybrid offspring that all had pink flowers. When the F1 plants were self-pollinated, the resulting F2-generation plants had a phenotypic ratio of 1 red: 2 pink: 1 white. The most likely explanation is:

A.	pink flower color is epistatic to red flower color.
B.	pink flowers are the result of a blending of the red and white genotypes.
C.	flower color is due to 2 or more complementary genes.
D.	heterozygous plants have a different phenotype than either inbred parent because of incomplete dominance of the dominant allele.
E.	flower color inheritance in snapdragons does not behave as a Mendelian trait.