AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

if the father is type A and the mother is type B, in order for baby Sylvester to have the genotype ii, his parents must be?

A	heterozygous
B	homozygous

Explanation:

Detailed explanation-1: -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". So the both parents are IBi, & the cross is IBi x IBi.

Detailed explanation-2: -Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types.

Detailed explanation-3: -AB blood type is codominant because the red blood cells have the products of both the A and the B alleles of the ABO gene.

Detailed explanation-4: -In order for a person to have type A blood, their genotype must be either AA or AO. A person must have inherited an A allele from at least one parent. They cannot have inherited a B allele from either parent.

There is 1 question to complete.