i. Create a legend which indicates the gene pairs (alleles) involved. Use a capi

Question

i. Create a legend which indicates the gene pairs (alleles) involved. Use a capital letter to denote the dominant allele and lowercase letter to denote the recessive allele. Example: D-dimples d= no dimples ii. Write the genotype and phenotype of the parents. Example: DD- dimples iii. Use a Punnet Square to cross the potential gametes of the parents iv. Determine the probability based on the Punnet Square. Autosomal Recessive Inheritance (trait only expressed if homozygous recessive) An albino man (nn) marries a normally pigmented woman (N chance that their children will be albino? who has an albino mother. What is the

Explanation / Answer

1. Men with DD amd dd women will be having Dimples and Not dimple phenotype respectively.

Two type of gametes are possible. D and d.

All the offsprings will be non pimple genotype.

2 Albino man having essentially genotype nn and normal phenotype may be having Nn or NN. Hence 50% chances are there to be Nn and 50% chances are if Nn is women genotype. Hence probability to child to be albino is 1/2 ×1/2=1/4.

Gametes D D d Dd Dd d Dd Dd

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