Normal human skin pigmentation is dominant over the albino trait. If an albino man expects a...
Normal human skin pigmentation is dominant over the albino trait. If an albino man expects a child with a woman who has normal skin pigmentation and whose father was albino, what are the possible genotypes and phenotypes of the child?
Could you give a detailed solution with explannation and pedigree table? Thank you!
Homework Answers
Albinism is an autosomal recessive disorder.
Genotype of normal person = AA, Aa
Genotype of an albino = aa
According to question,
Genotype of man (albino) = aa
Genotype of woman = Aa
(Woman will be Aa and not AA because her father was an albino with genotype aa. So, she will get one a allele from her father)
Aa × aa = F1 generation
| Gametes | a |
| A | Aa (normal skin colour) |
| a | aa (albino) |
Genotypic ratio = 1 (Aa) : 1 (aa)
Phenotypic ratio = 1 (normal) : 1 (albino)
Pedigree for the inheritance of albino in this family will be -
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