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Shop: Bridgetown Botanicals Bridgetown Botanicals   Original Sensible Seeds Feminized Cannabis Seeds   Unfolding Nature Unfolding Nature: Being in the Implicate Order

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InvisibleDiploidM
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Registered: 01/09/03
Posts: 19,274
Loc: Rabbit Hole
Weird Genetics
    #6718349 - 03/27/07 10:02 PM (17 years, 1 month ago)

Paris, March 27: Stunned geneticists have discovered a pair of twins who are somewhere between identical and non-identical, the British Science Journal Nature reported.

The world's only known case of "semi-identical" twins almost certainly arose from two sperm cells that fused with a single egg, it said.

The ground-breaking toddlers comprise an infant who is a hermaphrodite, meaning that it has both male and female genitalia, while the other is a boy whose sexual organs have developed normally.

"Their similarity is somewhere between identical and fraternal twins," said Vivienne Souter, lead author of the study, reported online Nature.

The babies were born in the United States, but their location and their identity have not been disclosed. They have almost no hope of survival.

Non-identical, or fraternal, twins are formed when two eggs meet two sperm in the womb. Each is fertilized independently, and each becomes an embryo.

With identical twins, one egg is fertilized by one sperm, and the embryo splits at some later stage to become two distinct -- but genetically equivalent -- human beings.

In the case reported today, one of two things happened, Souter said.

The first possibility is that an egg cell began to divide, without separating, and each budding part was then fertilized with a single sperm. The genes could then have gotten mixed up before the egg fully separated into two.

zeenews.com


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Republican Values:

1) You can't get married to your spouse who is the same sex as you.
2) You can't have an abortion no matter how much you don't want a child.
3) You can't have a certain plant in your possession or you'll get locked up with a rapist and a murderer.

4) We need a smaller, less-intrusive government.

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