Human Genetics Problem Set

Problem 19: Who is NOT the father of my grandson?

"What are the types that the fathers would have to be in order for him (grandson) to be a B+?"

A. B or O

B. A, B, AB or O

C. AB or B
The child must be genotype BO. The mother is the source of the O-allele and the biological father is the source of the B-allele.

D. A or B

E. A, B, or AB

The Biology Project
University of Arizona
Revised: November 5, 1998
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