Question

Consider the genetic cross for blood type of these two parents. The father is type A and the mother is type B. Both have the recessive allele for blood type O. What is the probability that these parents will have offspring with type A blood?

Answer 1

25% is the probability of having offspring with type A blood.

Answer 2

Answer: The probability of having an offspring with type A blood is 1/4.

Explanation: Since each of the parents have a recessive allele for blood type O, their genotypes are IAi and IBi for the father and mother respectively. A cross between them will produce four offsprings: one with type AB blood, one with type A blood, one with type B blood and one with type O blood.

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