A member asked:

What possible bloodtype for a first baby boy if the father is blood type a?

2 doctors weighed in across 2 answers

Hard to say.: Mother's blood type needed too.

Answered 11/18/2013

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Any: It depends on mom's blood type as well. This would be a great time to brush up on mendelian inheritance. Dad can be genotype aa or ao, and there are a couple of unusual alleles as well with which you needn't be concerned for everyday questions like this.

Answered 1/1/2014

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