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White Leghorn chickens are homozygous for a dominant allele, C, of a gene responsible for coloured feathers, and also for a dominant allele I, of an independently segregating gene that prevents the expression of C. The White Wyandotte breed of chickens is homozygous recessive for both genes, c/c,i/i. What proportion of the F2 progeny obtained from mating White Leghorn X White Wyandotte would be expected to have coloured feathers?

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