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In poultry, the allele, B, can result in the black feathers. Its allele, b, can generate white splashed feathers the heterozygous results in blue feathers. The factors O and C are both needed for any colour at all in feathers. Homozygous recessiveness at either locus results in white feathers. In each of following three cases provide the genotype of parental birds and their offspring.

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