What is the most likely genotype of the mother?

Question

i really need help with this problem....

in humans, a heredity disease known as phenylketonuria (PKU) is caused by an autosomal (not s*x linked) recessive gene. individuals will be born with PKU if they are homozygous recessive.

assume that P is the allele for the normal, functioning condition, and p is the allele for the defective gene that can lead to PKU. a man who is a carrier of PKU ( but does not have the disease) has 6 children. if none of thier 6 children have PKU, what is the most likely genotype of the mother?

a) PP

b) Pp

c) pp

d) none of these choices will give the correct result

thanks in advance

Answer 1

PP, because then every baby would have at least one diminant gene.

Since the dad is Pp (he carries the recessive it says, but doesn't show it so he can't have both pp)

then PP x Pp could only create two genotypes for the kids, no matter what. those genotypes are PP or Pp, same as the parents; thus none of the kids would have the disease.

Answer 2

PP