Sasha thinks she may have been adopted. She has blood type O, but mother has AB and her
father has B blood type. Based on what we\'ve discussed in class, is it possible for Sasha\'a
parents to have an O blood type child? Justify and explain your answer, give the genotype of
Sasha and both of her parents. It is.
Solution
The O allele for blood type, is recessive to both the A and B allele and both the alleles A and B
are co dominant, hence based on this fact Sasha parents when having the blood type AB and B
have the genotypes AB and BO and for Sasha to have the O type blood she has to be
homozygous for O allele as it is recessive to both A and B type; hence it is not possible as only
one of the parents has the O allele and homozygosity cannot be achieved in the offspring i.e.
Sasha..
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Sasha thinks she may have been adopted. She has blood type O, but mot.pdf
1. Sasha thinks she may have been adopted. She has blood type O, but mother has AB and her
father has B blood type. Based on what we've discussed in class, is it possible for Sasha'a
parents to have an O blood type child? Justify and explain your answer, give the genotype of
Sasha and both of her parents. It is.
Solution
The O allele for blood type, is recessive to both the A and B allele and both the alleles A and B
are co dominant, hence based on this fact Sasha parents when having the blood type AB and B
have the genotypes AB and BO and for Sasha to have the O type blood she has to be
homozygous for O allele as it is recessive to both A and B type; hence it is not possible as only
one of the parents has the O allele and homozygosity cannot be achieved in the offspring i.e.
Sasha.
