Both Members of a Couple Are Carriers for a Recessive

Multiple Choice

Both members of a couple are carriers for a recessive disease allele. If the couple has four children, which of the following statements must be true?

A) One of the children has the disease.
B) Two of the children have the disease.
C) All of the male children have the disease.
D) Fifty percent of the children could be carriers of the disease.