Cross a pure A type blood with a pure B type blood; write the phenotype, genotype, and ratios

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Jonathan Lamb

Biology

6 August, 05:52

Cross a pure A type blood with a pure B type blood; write the phenotype, genotype, and ratios

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Kassandra Bernard · Answer 1

If one parent has the pure A blood type (both alleles are A) is with genotype AA The other parent has the pure B blood type (both alleles are B) is with genotype BB

Crossing these two: AB AB AB AB

which means that all of the children will have AB blood type (phenotype). This happens because of the codominance. The A and B alleles are codominant and therefore, if an A is inherited from one parent and a B from the other, the phenotype will be AB.