Define incomplete dominance. How does this condition affect the phenotypic ratio in the F2 generation of a monohybrid cross?
Incomplete dominance is the condition in heterozygous individuals in which the presence of one allele does not completely obscure the presence of the other, and the resulting phenotype is intermediate between either homozygous phenotype. Thus, in F2 generations, where the original P generation crossed a parent homozygous for one allele with a parent homozygous for the other, both the genotypic and phenotypic ratios would be 1:2:1 since the heterozygous individuals would express an intermediate combination of both homozygous phenotypes.
