If the Characteristic Followed in the Pedigree Is Autosomal Recessive

Multiple Choice

If the characteristic followed in the pedigree is autosomal recessive, what is III-1's genotype?

A) Either homozygous dominant or heterozygous
B) Definitely heterozygous
C) Definitely homozygous dominant
D) Must be homozygous recessive
E) Homozygous dominant since he is a male but a female would be heterozygous