If two persons with ‘AB’ blood group marry and have large number of children

If two persons with ‘AB’ blood group marry and have sufficiently large number of children these children could ve classified as ‘A’ blood gorup: ‘AB’ blood group: ‘B’ blood group in 1 : 2 : 1 ratio. Modern technique of protein eletrophoresis reveals presence of both ‘A’ and ‘B’ type proteins in ‘AB’ blood group individuals. This is an example of:

Options

(a) incomplete dominance
(b) Partial dominance
(c) Complete cominance
(d) Comdominance

Correct Answer:

Comdominance

Explanation:

ABO blood group system in human beings is an example of codominant, dominant recessive and multiple alletes. Blood groups are controlled by the gene I located on 9th chromosome that has 3 multiple alleles, out of which any two are found in a person. In codominance bothe gene express it self completely.

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