In familial hypercholesterolemia, individuals homozygous for the allele causing the disorder completely lack receptor while individuals homozygous for the normal allele are phenotypically normal. this is an example of

a) codominance

b) epistasis

c) incomplete dominance

d) complete dominance

The right answer is C.

Incomplete dominance is when hybrids of the F1 generation have an intermediate phenotype (between the two phenotypes). That is, in the case of familial hypercholesterolemia, if the subject is heterozygous it will have 50% functional receptors compared to a healthy homozygous subject.

Reflex actions are involuntary actions of the body. The individual is usually unable to control certain movement or actions of the body. It is controlled by the peripheral nervous system. It is also controlled by the brain stem and the spinal cord.

An example is the blinking of the eyes and shivering etc.