The persistence of the enzyme lactase
This question has two parts:
The ability of adult humans to digest milk is dependent on the persistence of the enzyme lactase into adulthood. Most humans stop producing lactase after infancy but a small portion of the population retains this ability. Non-persistence of lactase is a Mendelian trait that is autosomal recessive.
Give the genotypes for a mother who is non-persistent and a father who is heterozygous and lactase persistent.
On a piece of paper, do a Punnett square that predicts the lactase characteristics of the children from these parents then give me the phenotype ratio of the kids.
