3. An albino woman (no color in skin,hair,iris) whose father is albino and mothe

ID: 7394 • Letter: 3

Question

3. An albino woman (no color in skin,hair,iris) whose father is albino and mother normal ,marries a normal man, one of whose parents is normal and the other albino. He has an albino sister.The couple has a normal daughter.

3a) what are the genotypes of the mother and father of the albino woman?

b) what are the genotypes of the parents of the albino womans husband?

c) what is the albinos womans genotype?

d) what is the albinos woman's phenotype?

e) what is the genotype of the albino womans husband?

f) what is the new child's(daughter) genotype?

Explanation / Answer

a.Her father being albino also has the same genotype of "aa'. As the woman is albino, her mother should be heterozygous [Aa]for albinism.

b. The genotype of the parents of the albino woman's husband are : mother is normal while father is albino.As he also has an albino sister, this indicates that his mother is heterozygous[Aa].

c. The albino woman is homozygous recessive. Hence her genotype is "aa".

d. The albino woman will show the symptoms of albinism as she is homozygous recessive.

e. As the husband of the albino woman is normal in phenotype,we cannot say he is homozygous normal. he is heterozygous as his father is homozygous recessive and his mother is heterozygous.

f.The new child is phenotypically normal but is a heterozygote as her mother is an albino and her father is a heterozygote

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3. An albino woman (no color in skin,hair,iris) whose father is albino and mothe

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