A person has four phenotypes according to blood groups: I (0), II (A), III (B), IV (AB). The gene that determines the blood group

| November 23, 2020 | education

A person has four phenotypes according to blood groups: I (0), II (A), III (B), IV (AB). The gene that determines the blood group has three alleles: IA, IB, i0, and the i0 allele is recessive with respect to the IA and IB alleles. Parents have II (heterozygote) and III (heterozygote) blood groups. Determine the genotypes of the parents’ blood groups. Indicate the possible genotypes and phenotypes (number) of the blood group of children. Make a scheme for solving the problem. Determine the likelihood of inheritance in children of the II blood group. Parents have I and IV blood groups. Determine the genotypes of the parents’ blood groups. Indicate the possible genotypes and phenotypes (number) of the blood group of children. Make a scheme for solving the problem. Determine the likelihood of inheritance in children of the IV blood group.

P: II * III
IAi0 * IBi0
G: IA, i0 IB, i0 (circled gametes)
F: IAIB-IV group – 25%
IAI0- III group – 25%
IBI0- II group – 25%
I0I0 -I group – 25% (from all offspring)
The probability of inheritance in children of IV blood group – 25%



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