Question

Mrs. Smith has blood type A. Her father has blood type A, and her mother has blood type B. If Mr. Smith has blood type AB, what is

the probability that they will have a child with blood type AB?
A.
50%
B.
25%
c. 0%
D.
100%

Answer 1

25% is the probability that they will have a child with blood type AB.

B. 25%

Step-by-step explanation:

There are two alleles for a trait-a dominant trait and a recessive trait. The blood type trait, however, has three alleles, which correspond to the blood types A, B, and O.

The alleles of A and B are dominance over the blood type O.

But they do not show dominance towards the O. So, if Mrs. Smith's blood type (AO) is crossed with Mr. Smith's blood type (AB), their offspring will have a 50% of being blood type A (includes AA and AO), a 25% of being blood type AB, and a 25% of being blood type B (BO only).