Identify the non-Mendelian mode of inheritance for each of the following:
A.) A woman from a family with normal cholesterol marries a man with no LDL receptors, and all their children have cholesterol levels twice the normal of the mother.
B.) In humans, skin color follows a bell-shaped curve, with very few people having very dark or very fair skin, most people have a medium shade.
C.) Duchenne muscular dystrophy is almost always limited to boys, who inherit it from their non-affected mothers, who are heterozygous.
D.) Even though sickle-cell anemia is due to a single allele, it causes many phenotypic changes in those affected.
E.) A white cow crossed with a red bull yields roan calves.