Ancient Genetic Material Keeps Pups Pint-Sized

Soon after humans began domesticating dogs 12,000 to 15,000 years ago, they started breeding small canines. Now, scientists from the University of Utah and seven other institutions have identified a piece of doggy DNA that reduces the activity of a growth gene, ensuring that small breeds stay small.

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<p><a href="http://www.physorg.com/news95001402.html">Ancient Genetic Material Keeps Pups Pint-Sized</a></p> <p>Soon after humans began domesticating dogs 12,000 to 15,000 years ago, they started breeding small canines. Now, scientists from the University of Utah and seven other institutions have identified a piece of doggy DNA that reduces the activity of a growth gene, ensuring that small breeds stay small.</p>