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'Down Syndrome' in Chimps


Still Waters

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Researchers from Japan's Kyoto University have documented just the second case in chimpanzees of a genetic disorder similar to Down syndrome in humans.

The chimp, a captive-born 24-year-old female named Kanako, has a third copy of chromosome 22, in a condition called trisomy 22. (In humans, Down syndrome is known as trisomy 21, for a third copy of chromosome 21.)

The only such prior case in the species was observed in 1969, in a chimp that did not live to be two years old.

http://www.seeker.com/down-syndrome-in-chimps-seen-for-only-the-second-time-2276850630.html

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