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Rare Semi-Identical Twins Discovered

daftna (630630) writes | more than 7 years ago

Biotech

daftna (630630) writes "Twins can be identical, fraternal and apparently semi-identical, scientists now report.

Researchers discovered twins who are identical on their mom's side of the equation but share only half their genes from dad.

Here's how it happened: Two sperm cells fertilized one egg — an event assumed to be very rare — then split into two embryos."

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