Question

Sarah has type A blood, and Jesse has type O blood. Their son has type B blood. Can Jesse be the baby daddy? He is a bit worried.

Please complete the Punnett squares to determine the possibilities.

a
No, type B blood must be homozygous
b
No, this is impossible
c
Yes, if both parents are heterozygous
d
Yes, if one parent is heterozygous

Answer 1

c
Yes, if both parents are heterozygous