Penetrance Is the Percentage of Individuals Having a Particular Genotype

Multiple Choice

Penetrance is the percentage of individuals having a particular genotype that express the associated phenotype. Expressivity is the degree to which a trait is expressed. Incomplete penetrance and variable expressivity result from the influence of other genes and environmental factors on the phenotype.
-How does incomplete dominance differ from incomplete penetrance?

A) Incomplete dominance refers to alleles at the same locus; incomplete penetrance refers to alleles at different loci.
B) Incomplete dominance ranges from 0% to 50%; incomplete penetance ranges from 51% to 99%.
C) In incomplete dominance, the heterozygote is intermediate to the homozygotes; in incomplete penetrance, heterozygotes express phenotypes of both homozygotes.
D) In incomplete dominance, the heterozygote is intermediate to the homozygotes; in incomplete penetrance, some individuals do not express the expected phenotype.