PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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type B
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type O
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type A
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type AB
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Detailed explanation-1: -For blood groups, the alleles are A, B and O. The A allele is dominant over the O allele. So, a person with one A allele and one O allele (AO) has blood group A.
Detailed explanation-2: -There are three possible alleles for blood type, A, B, and o. However, A and B alleles are both dominant to O alleles. Thus, for a person to have type O blood, they must inherit two O alleles. If a person inherits an A allele and an O allele, they will still have type A blood.
Detailed explanation-3: -The ABO blood type is inherited in an autosomal codominant fashion. The A and B alleles are codominant, and the O allele is recessive.
Detailed explanation-4: -Blood groups are hereditary. They have a Mendelian pattern, in other words, they are the product of a single gene. The ABO gene has three types of alleles: A, B, and O. The first two, A and B, are codominant, in other words, they dominate equally.