A man is accused of being a biological father of a child. The child has blood group O, the mother has blood group B. The mans blood group is identified as AB. Is there a chance that the accused male can be the father? Prove using a genetic diagram. Provide a conclusive statement in your answer.
Question
A man is accused of being a biological father of a child. The child has blood group O, the mother has blood group B. The mans blood group is identified as AB. Is there a chance that the accused male can be the father? Prove using a genetic diagram. Provide a conclusive statement in your answer.
Solution
The blood type in humans is determined by the combination of alleles that a person inherits from their parents. There are three types of alleles: A, B, and O. The A and B alleles are dominant over the O allele.
The mother with blood type B can have two combinations of alleles: BB or BO. The child with blood type O can only have OO alleles. This means that the child must have inherited an O allele from the mother.
The man with blood type AB has two alleles: A and B. This means he cannot contribute an O allele to the child's genotype.
Therefore, based on the blood types, the accused man cannot be the biological father of the child.
Here is a simple genetic diagram to illustrate this:
Mother (B): BO x Father (AB): AB Possible combinations for the child: AO, BO, AB, BB
As you can see, none of these combinations result in a child with blood type O.
In conclusion, the accused man with blood type AB cannot be the biological father of the child with blood type O.
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