What are the chances of an O negative father and A positive mother have a child?

It's important to understand that the question isn't about the *chances* of having a child, but rather the possible blood types the child could inherit.

Here's how blood type inheritance works:

* Blood type is determined by two genes, one from each parent.

* There are three possible alleles: A, B, and O.

* Alleles A and B are dominant, while O is recessive.

The father's blood type is O negative. This means he has two O alleles (OO).

The mother's blood type is A positive. This means she has one A allele and one O allele (AO).

Possible blood types for their child:

* A positive (AO)

* O positive (OO)

Therefore, the child can inherit either A positive or O positive blood type.

Important Note: The Rh factor (positive or negative) is a separate gene and inherited independently of the ABO blood type. Since the father is Rh negative, the child has a 50% chance of being Rh negative and a 50% chance of being Rh positive.

In conclusion, an O negative father and an A positive mother can definitely have a child, and the child's blood type could be either A positive or O positive.

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