A phenotypic effect of heterozygous recessive white in the fowl

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Abstract
The dominance of the allele C+ of the recessive white gene c was previously thought to represent one of the relatively uncommon examples of complete dominance in the fowl. In a study with cockerel-breeding Partridge Wyandotte Bantams, dilution effects on both phaeomelanin and eumelanin were observed in C+ heterozygotes indicating that C+ is not completely dominant over its recessive allele.