Question

Phenylketonuria, a metabolic disease in humans, is caused by a recessive allele, k. if two heterozygous carriers of the allele (k/+) marry and plan a family of five children, is what is that probability that all of their children will be normal

Answer 1

Answer If two hereizygous carrier of phenylketonuria marry and plant to give birth to five children, then 25% of child will be normal, 25% affected and 50% carrier.it can also be shown from given below presentation: Heterozygous carrier x Heterozygous carrier K/k+. X. K/k+ Gametes. K,k+,k,k+ F1 offspring KK, kk+, kk+,k+k+.