Problem: ABO Blood Type (read more about ABO blood typing here http://www.nlm.ni

Question

Problem: ABO Blood Type (read more about ABO blood typing here http://www.nlm.nih.gov/medlineplus/ency/article/003345.htm)

Juan marries Keisha. Juan has the type A blood type. His mother has type O blood type. Therefore, we know Juan's genotype must be IAi. Keisha has type B blood type, but has a father with type O blood type. Therefore, we know Keisha's genotype must be IBi. They decide to have a child. What are the genotypic and phenotypic ratios, representing all possibilities in an individual child between them with respect to blood type?

Complete a Punnett square on your own paper to solve this problem.

Genotypic Ratio: 2 IAi : 2 IBi

Phenotypic Ratio: 2 type A : 2 type B

Genotypic Ratio: 1 IAi : 1 IBi : 2 ii

Phenotypic Ratio: 1 type A : 1 type B : 2 type O

Genotypic Ratio: 1 type AB : 1 type A : 1 type B : 1 type O

Phenotypic Ratio: 1 IAIB : 1 IAi : 1 IBi : 1 ii

Genotypic Ratio: 1 IAIB : 1 IAi : 1 IBi : 1 ii

Phenotypic Ratio: 1 type AB : 1 type A : 1 type B : 1 type O

Explanation / Answer

Genotypic Ratio: 2 IAi : 2 IBi

Phenotypic Ratio: 2 type A : 2 type B

Genotypic and phenotypic ratio: 1:1

Genotypic Ratio: 1 IAi : 1 IBi : 2 ii

Phenotypic Ratio: 1 type A : 1 type B : 2 type O

Genotypic and phenotypic ratio: 1:2:1

Genotypic Ratio: 1 type AB : 1 type A : 1 type B : 1 type O

Phenotypic Ratio: 1 IAIB : 1 IAi : 1 IBi : 1 ii

Genotypic and phenotypic ratio : 1:1:1:1

Genotypic Ratio: 1 IAIB : 1 IAi : 1 IBi : 1 ii

Phenotypic Ratio: 1 type AB : 1 type A : 1 type B : 1 type O

Genotypic and phenotypic ratio : 1:1:1:1

male/female IA IB i i IA IA IA IA IB IA i IA i IB IA IB IB IB   IB i   IB i i   IA i   IB i ii ii i   IA i   IB i ii ii

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