A person with type A blood has a child with a person who has type AB blood. Is it possible that the child can have type B blood? Explain using a Punnett square.

Md Ariful Islam

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Md Ariful Islam

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Yes , it’s possible if person with type A blood has a genotype IAj0

IAj0 and IAIB

So if we draw Punnett square we get such offspring

F 1: IAIA , IAIB , IAj0 , IBj0

So we have probability 25% to get child with type blood B( IBj0 )

But of person with type A blood has genotype IAIA , their child can not have type B blood , because of:

IAIA and IAIB

Offspring has genotypes IAIA or IAIB

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