I could use some help with this question for my genetics cla

I could use some help with this question for my genetics class. Thank you!

3. Albinism in humans is inherited as a simple recessive trait. For the following families, determine the genotypes of the parents and offspring. (when two alternative genotypes are possible, list both).

A) Two normal parents have five children, four normal and one albino.

B) A normal male and an albino female have six children, all normal.

c). A normal male and am albino female have six children, three normal and three albino.

d). construct a pedigree of the families in b and c. Assume that one of the normal children in b and one of the albino children in c become the parents of eight children. Add these children to the pedigree, predicting their phenotypes (normal or albino).

Solution

Recessive traits expressed when both dominant alleles are inactive. Albinism occur due to melanin genes are mutated or not expressed. MM = No albinism; mm = Albino

A. Mm, Mm is the parent genotypes, in which both are heterozygotes. their normal childrens contain either MM or Mm genotypes. Albino child contain mm genotype

B. Normal male = MM, Albino female = mm; All six children have normal of genotype of Mm

C. Normal male = Mm, Albino female = mm; Three normal children have genotype of Mm, three albino children have mm genotypes