Question

1. alleles for the a and b blood cell antigens are codominant. the condition where no antigens are present on the blood cells (type o blood) is a recessive trait. which set of parents can most likely produce a child with type o blood?

a. one parent with type ab blood, and the other parent with type a blood
b. one parent with type ab blood and the other parent with type o blood
c. one parent with heterozygous type a blood, and the other parent with type o blood
d. one parent with homozygous type a blood, and the other parent with homozygous type b blood

53.

1. one of the parents of a child has phenylketonuria (pku), which is caused by recessive alleles. the other parent does not have the pku alleles. what is the chance that the couple will have a child with phenylketonuria?

a. 0%
b. 50%
c. 75%
d 100%

Explanation:

Answer:

C. one parent with heterozygous type A blood, and the other parent with type O blood
A. 0%