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Four children pf a couple have blood gr...

Four children pf a couple have blood groups A, B AB and O. What could bethe Genotype of the parents?

A

both parents are homozygous for ‘A’ group

B

one parent is homozygous for ’A’ and another parent is homozygous for ‘B’

C

one parent is heterozygous for ‘A’ and another parent is heterozygous for ‘B’

D

both parents are homozygous for ‘B’ group

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