A Severe Disease That Is Inherited as an Autosomal Recessive

Multiple Choice

A severe disease that is inherited as an autosomal recessive trait is more likely to skip generations in a pedigree than an autosomal recessive trait that causes a harmless phenotypic variant because

A) a person with the harmless variant is less likely to reproduce than a person with the disease.
B) a person with an autosomal recessive disease is less likely to be well enough to reproduce than a person with a harmless trait variant.
C) all inborn errors of metabolism are dominant.
D) a family with an autosomal recessive disease is usually much smaller than a family with an autosomal recessive harmless trait variant.