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4.Principles of Inheritance and Variation
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The probablity of having a child with blood group $O$ to parents with blood groups $A$ and $B$ is
A
$4$ out of $4$
B
$3$ out of $4$
C
$2$ out of $4$
D
$1$ out of $4$
Solution
(d)Since the blood groups of parents are $A$ and $B$, therefore their genotypes are $AO$ and $BO$ so the possible genotypes of their children are $AO, BO, AB$ and $OO$ i.e. the possible blood groups are $A, B, AB$ and $O$.
Standard 12
Biology
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