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In mice the autosomal genotype yy is for gray fur, YY is for brown fur and...

In mice the autosomal genotype yy is for gray fur, YY is for brown fur and Yy is for yellow fur. What is the ratio of offspring from the cross between a brown mouse and a yellow mouse?


ABO blood groups, an autosomal trait, in Humans are genetically determined. A woman with type O blood has a son with type O.


What are the possible genotype(s) of the son, his mother and possible father?


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