Question

Galactosemia is an inherited disorder in humans. A person with the disorder cannot digest the sugars in milk. The allele for normal digestion (G) is dominant; the allele for galactosemia (g) is recessive. A female who is heterozygous for the galactosemia trait and a male who has galactosemia have a child. In your response, be sure to: Identify the genotypes of the mother and father

Answer 1

Answer:

This question is incomplete, the remaining part of the question is:

" Explain how this disorder can be passed on in the family. In your response, be sure to: Identify the genotypes of the mother and father"

Please find the explanation below

Explanation:

According to this question, the Galactosemia trait is an inherited disorder in humans that causes inability to digest the sugars in milk. The allele for normal gene (G) is dominant over the allele for galactosemia (g). This means that a heterozygous human (Gg) will not be normal (no galactosemia).

In this family, female who is heterozygous for the galactosemia trait (Gg) and a male who has galactosemia (gg) have a child. Note that each parent will produce gametes as follows:

Gg - G and g gametes

gg - only "g" gametes

To inherit this disorder or for the parents to pass on this disorder to their child (children), they have to both contribute the allele for galactosemia (g) in their gametes to produce a child that has two galactosemia alleles in his/her genotype i.e. gg

This means that in this cross (see attached image), the probability of their child to have the disorder is 1/2 or 50% while the probability of having a normal child is also 1/2 or 50%.