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Name:  Bryan
Status: student
Age: K-3
Location: CA
Country: N/A
Date: 3/30/2005

Why do some animals have fur that changes color in the winter, like the arctic fox? Is it because of their DNA?

Yes. But not all genes are turned on all the time. Some genes are signaled to turn on or off depending on triggers from the environment. So in the arctic fox, the genes for coat color are on or off depending on the temperature of their environment.


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