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DrRussMD
DrRussMD, Board Certified MD
Category: Medical
Satisfied Customers: 64393
Experience:  Board certified Internal medicine and Integrative medicine. Many years of experience all areas.
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how can a person not have the same blood group as the parent

Customer Question

how can a person not have the same blood group as the parent ? As both are A positive and child O positive.
Submitted: 3 years ago.
Category: Medical
Expert:  DrRussMD replied 3 years ago.
Hello
Each A parent has a recessive O gene as well.
In about 1 out of 4 cases, 2 A parents can have an O child.

Imagine A,i.

Put that across the top of a 4 square.
But an A, i, along the left side of the 4 square as well.

You will get AA, Ai, Ai, and ii.
A is dominant, so where ever there is an A, it will be an A type child.
An ii, will be an O.

Use reply to let me know if you have further questions. [click reply to expert].
Please to not forget a positive rating.
Customer: replied 3 years ago.

thank you as i am a triplet and O positive and both sister and brother are A positive just want to know

Expert:  DrRussMD replied 3 years ago.
It is all normal.
good luck
Use reply to let me know if you have further questions. [click reply to expert].
Please to not forget a positive rating.