A person with A blood type marries a woman with B blood type. Is it possible for them to have a child with O type blood? Note:Remember that each person has two alleles for each trait.

CARDIOVASCULAR PHYSIOLOGY

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

A	True
B	False
C	Either A or B
D	None of the above

Explanation:

Detailed explanation-1: -Yes, it is possible for a parent with type A blood and another parent with type B blood to produce a child with type O blood. This can only occur under one condition and that is the condition that both of the parents are heterozygous.

Detailed explanation-2: -A man with type A blood group married a woman with type B. The child gets the blood group of O. It is due to the result of two recessive alleles. The parents are heterozygous, so that that child will receive one recessive allele from the parents.

Detailed explanation-3: -An O and B crossing can not produce an A or AB child. An AB with an O can produce A children or B children but not O. In short the ABO system can prove you are not a parent but not that you are, as there are millions of other people with the same blood group.

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