ABO blood grouping in human beings cites the example of
A
Incomplete dominance
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B
Co-dominance
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C
Multiple allelism
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D
Both B and C
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Solution
The correct option is A Both B and C ABO blood group system in human beings is an example of
codominance and multiple alleles. Codominance is a phenomenon in which
alleles which do not show dominance-recessive relationship are able to
express themselves independentlywhen present together.
More than
two alternate forms of a gene present on the same locus are called as
multiple alleles and the mode of inheritance in these alleles is called
as multiple allelism. Human beings have six genotypes and four blood
group phenotypes A, B, AB and O.