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barry barry
wrote...
Posts: 11630
11 years ago
Comb shape in chickens also involves the interaction of two genes, but the F2 generation shows a typical 9:3:3:1 Mendelian ratio. How does this work?
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wrote...
Staff Member
11 years ago
A dominant allele present in one gene in combination with the homozygous recessive state in the other gene produces one of two phenotypes (rose or pea). Both dominant alleles present produce a third phenotype (walnut), and both homozygous recessives produce a fourth phenotype (single). The ratio is 9 walnut : 3 rose : 3 pea : 1 single.
- Master of Science in Biology
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