arnisador
03-26-2007, 03:10 PM
Rare Semi-Identical Twins Discovered (http://news.yahoo.com/s/livescience/20070326/sc_livescience/raresemiidenticaltwinsdiscovered)
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.
"Their similarity is somewhere between identical and fraternal twins,"
I think this is neat (although it was discovered because one twin has a congenital medical condition). Half-identical twins!
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.
"Their similarity is somewhere between identical and fraternal twins,"
I think this is neat (although it was discovered because one twin has a congenital medical condition). Half-identical twins!