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.