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Genetics/genetic blood types


blondie wrote at 2014-03-14 07:54:43
This answer is only partially correct.  In simplified terms, if one parent is a Bombay (hh) that parent is incapable of expressing the A or B antigen, so phenotypically they appear to be group O.  However, they can pass their A or B "antigen" to their offspring.  Therefore, assuming the offspring receives the H "antigen" from the other parent who is blood group O (expressed as OO) that offspring will express the A or B "antigen" (expressed as AO or BO).  Hence, two parents who appear to be blood group O can have a child with blood group A or B.


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I am able to answer questions regarding human medical genetics, mouse genetic studies, molecular biology, biochemistry, and cell biology. I am also able to answer questions concerning prenatal and postnatal genetic testing but am ethically unable to give advice on such test results.


I have 10 years experience in human genetics, including clinical, population, and molecular genetics. I am currently an active researcher in molecular and developmental genetics at Virginia Commonwealth University/ Medical College of Virginia. I have previously taught genetics and cell biology at the college level.

American Association for the Advancement of Science (AAAS) American Society of Human Genetics

B.S., Biochemistry, University of Southern Mississippi
M.S., Human Genetics, Louisiana State University Medical Center
Ph.D., Genetics and Vision Science, University of Alabama at Birmingham

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