Couples offspring having six digits and half of them having five? (draw a punnett square to your answer.)

a.) both parents are homozygous for the recessive trait

b.) both parents are heterozygous.

c.) one parent is heterozygous while the other is homozygouss for the recessive trait.

d.) one parent is homozygous for the recessive trait while the other is homozygous for the domminant trait