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Question

What is the probability of having children with 'O' blood group, where both mother and father are heterozygous for 'A' and 'B' blood group, respectively?

Options

A.25%
B.0%
C.75%
D.50%

Solution

Sol. [Key Concept: Blood-group inheritance — probability of 'O' group]

Blood group (AB) (A) (B) (O)

∵ Out of four children, one is with blood group 'O'.

∴ The probability of having children with 'O' blood group will be $25\%$

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