AP BIOLOGY

HEREDITY

CODOMINANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A man with type O blood has children with a woman who is heterozygous for type A blood. What is the probability that their children will have type A blood?
A
0%
B
25%
C
50%
D
100%
Explanation: 

Detailed explanation-1: -One combination, OO, gives blood type O. So there’s a 1 out of 4, or 25% chance, that the child will have blood type O and 3 out of 4, or 75% chance that the child will have blood type A.

Detailed explanation-2: -Answer and Explanation: If a AB blood type woman and a O blood type man have a child, then their children’s probable blood type will be either A or B blood type. No O or AB blood type would be possible.

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).

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