Expert answer:Gene duplication is an important evolutionary mech

  

Solved by a verified expert:GENE Duplication for Evolutionary Mechanisms
Gene duplication is an important evolutionary mechanism and,
as result , many cases are known where species has two nearly identical
genes.ySuppose there are two genes, A and B , that specify production of the
same enzyme. An abnormal phenotype results only if an individual does not make
any of that enzyme. What ratio of normal vs abnormal progeny would result from
a mating between two parents of the genotype AaBb , where A and B represent
alleles that specify production of the enzyme, and a and b are alleles that do
not.

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