HEREDITY
MULTIPLE ALLELES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A
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B
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C
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O
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P
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Detailed explanation-1: -There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.
Detailed explanation-2: -Someone with blood type O has neither the A nor the B allele. The genotype must be OO.
Detailed explanation-3: -But if you have type O blood, your red blood cells have no A or B markers. So: Your body will have both A and B antibodies and will therefore feel the need to defend itself against A, B, and AB blood. A person with O blood can only get a transfusion with O blood.
Detailed explanation-4: -O positive red blood cells are not universally compatible to all types, but they are compatible to any red blood cells that are positive (A+, B+, O+, AB+). Over 80% of the population has a positive blood type and can receive O positive blood. That’s another reason it’s in such high demand.