AP BIOLOGY

HEREDITY

INCOMPLETE DOMINANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A woman has type B blood and her husband has type O blood. What must be the woman’s genotype, if they have a child with type O blood?
A
IB i
B
IB IB
C
ii
D
type B blood
Explanation: 

Detailed explanation-1: -Combination Genotypes: OO Blood Genotype In order for a person to have type O blood, their genotype must be OO. A person must have inherited an O allele from both parents. If they inherit an A or B from either parent, then they will not be a type O.

Detailed explanation-2: -The genotype of a woman with type A blood whose father has type O blood is AO. This is because the O blood allele is recessive and will only produce the O blood type of both alleles in a person are O.

Detailed explanation-3: -A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father).

Detailed explanation-4: -One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types.

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