Tracing Specific Alleles
Date: Winter 2012-2913
My question is that if both the parents have same blood group let it be A-ve than how will we find that which blood group belong to their foetus either of father or mother?
The possible combination in the foetus could be
A-, or O-
If you know the blood type of the parents and all of the children, sometimes you can figure it out, but not always. That is because every human has two copies of genes. What you see, the phenotype, is the result of the combination of both parents versions of the genes (called alleles). For example, when a person has type A blood (the phenotype), they can have genotypes of either AA (both parents gave A alleles) or AO (one parent gave an A and the other gave an O). A dominates over O. So, if both parents are A and the child has type O blood, we know that both parents had the genotype AO. But if the child is type A, we can't determine for sure what the parents' blood types were. They COULD both be A, but one or both could also be AO.
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Update: November 2011