GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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three recessive alleles
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three codominant alleles
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three alleles, two dominant and one recessive
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three alleles, two recessive and one dominant
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Detailed explanation-1: -Human blood is controlled by three alleles that create the ABO blood types. A and B are co-dominant, while the third allele, O, is recessive to the other two alleles. Below are a number of parent combinations.
Detailed explanation-2: -The ABO locus has three main allelic forms: A, B, and O. The A and B alleles each encode a glycosyltransferase that catalyzes the final step in the synthesis of the A and B antigen, respectively.
Detailed explanation-3: -The test to determine your blood group is called ABO typing. Your blood sample is mixed with antibodies against type A and B blood. Then, the sample is checked to see whether or not the blood cells stick together. If blood cells stick together, it means the blood reacted with one of the antibodies.
Detailed explanation-4: -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-5: -For example, the ABO blood group system has three alleles that affect the expression of antigens on the surface of red blood cells: alleles A, B, and O. Both alleles A and B are expressed in individuals with the AB blood type.