Thursday, February 21, 2008

New Findings on Twin's DNA

New research expands on the idea that identical twins DNA is not the clone copy we once thought it was. In 2005 found that identical twins differ in how their genes express themselves, now scientists are reporting findings that suggest all identical twins differ genetically from their partners to some degree.

The study found that while twins have identical genomes (the entire hereditary key including both the genes and the non-coding sequences of the DNA) , they often differed in the number of copies of individual gene segments. One twin might be missing a segment, or possess more copies of that segment than the other twin. This would explain why one identical twin can suffer from a disorder while the other remains healthy.

Fun Fact: Identical twins don't have the same fingerprints because genes don't determine fingerprints. They come about by random stresses experienced in the womb- even a small different umbilical cord length can change your finger print.

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