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1 definition by Twin Towers2

 
1.
A fertilized egg is a zygote. Twins can come from the same egg that splits by meosis. Identical twins come from the same egg and are the same sex, but are not clones; personality and many other things are different including mental and physical illnesses. Fraternal twins come from seperate eggs and can be different sexes.
When two twins compete, one is usually a little to a lot better than the other.
by Twin Towers2 May 17, 2010