Genetics/Genetic blood typing
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Question
If one parent is O- and the other parent is B+, can the baby be O+?
Kerry,
Yes, it is possible, and here is how:
The O- parent has the genotype OO/Rh-Rh- and can only pass on O/Rh- genes to the child; the second parent has a possibility of four genotypes, BB/Rh+Rh+, BO/Rh+Rh+, BB/Rh+Rh-, or BO/Rh+Rh- and can pass on the combinations B/Rh+, B/Rh-, O/Rh+, or O/Rh-. The child who is O+ can be either OO/Rh+Rh+ or OO/Rh+Rh- and has received from one parent O/Rh+ and from the other parent O/Rh- or O/Rh+ (depending on the specific genotype). Both of these combinations could have come from the two parents mentioned, that is, O/Rh- from the first parent and O/Rh+ from the second parent to combine into OO/Rh+Rh-.
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Answers by Expert:
K Shows
Expertise
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.
Experience
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.
Organizations
American Association for the Advancement of Science (AAAS)
American Society of Human Genetics
Education/Credentials
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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