MadSci Network: Genetics

Re: O+ Father AB+ Mother, what could the baby's blood type could be?

Date: Mon Apr 7 21:16:06 2003
Posted By: Michael Watson, Biomedical Engineer currently Teaching Math/Biology
Area of science: Genetics
ID: 1046214405.Ge

Normally, based on the genotypes that you have listed the baby will either 
be "B+" (genotype BO) or A+ (genotype AO).  So usually the answer to your 
question is no. However, there are anomalies to the ABO blood typing.  One 
example is the Bombay phenotype.  I do not know of any that are specific 
to AB and O blood type matches.  However, there might be one.

The website listed below gives you a table of parents and offspring 
blood types
This website discusses the rare exceptions to the rule

Hope this helps


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