Himalayan rabbits are homozygous for a mutation in the tyrosinase gene that causes temperature-sensitive pigment production. They develop black fur on their extremities (ears, nose, paws) where body temperature is lower, and white fur on their torso. What does this phenomenon best illustrate?

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Himalayan rabbits are homozygous for a mutation in the tyrosinase gene that causes temperature-sensitive pigment production. They develop black fur on their extremities (ears, nose, paws) where body temperature is lower, and white fur on their torso. What does this phenomenon best illustrate?

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