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Size differences between dogs come down to a single change in a single gene.
Duration: 3 minutes
All dogs are members of the same species, and each characteristic breed is a result of selective breeding by humans. Now, scientists have found that the extreme differences in dog size – between say a Chihuahua and Great Dane – are largely determined by a single change in a single gene.
"A Single IGF1 Allele is a Major Determinant of Small Size in Dogs" by Nathan B. Sutter and others, Science (volume 316), April 6, 2007, pages 112-115.
POSTED April 25, 2007
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