Basic body color for horses is influenced by several genes, on of which has several different alleles. Two of these alleles, the chestnut (dark brown) allele and a diluting (pale cream) allele (often incorrectly called ‘albino’), display incomplete dominance. A horse heterozygous for these two alleles is a palomino (golden body color with flaxen mane and tail). Is it possible to produce a herd of pure breeding palomino horses? Why or why not? Work the Punnett’s square for mating a palomino to a palomino and predict the phenotypic ratio among their offspring.
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