AP BIOLOGY

HEREDITY

CODOMINANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the genotype of a person who is heterozygous for type B blood?
A
IBIB
B
IBi
C
IAIB
D
IAi
Explanation: 

Detailed explanation-1: -The possible genotypes of B blood group are IB IO and IB IB. If father is heterozygous for B blood group (IB IO) and mother is heterozygous for A blood group (IA IO), their child can have O blood group.

Detailed explanation-2: -Individuals with either the IAIA or IAi genotypes have blood type A. Those with IBIB or IBi have blood type B. Those with IAIB have blood type AB, and those with ii have blood type O.

Detailed explanation-3: -Heterozygous means one dominant & one recessive allele. Since they are Type “B", the dominant allele is IB, & the only recessive allele for blood type is “i".

Detailed explanation-4: -Genotypes BB and BO have Type B Blood Genotypes BB and BO refer to individuals having either two “B” alleles for blood type, or one “B” allele and one “O” allele. Both of those genotypes results in having Type B blood. The BO genotype results in Type B blood because B is dominant over O.

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