TWINS

TWINS

hello,now i'm going to talk about twins.

identical twins:
twins happen when breach of fertilized egg divides into two separate babies.Each twin has her or his own differces about physical and personality.The two halves are genetically identical. Identical twins can be one boy and one girl but usually are of the same sex and they share the same DNA.











Fraternal (non identical) twins:

usually happen when two fertilized are implanted in the
uterine wall at the same time that is when the mother releases two eggs and the two together become fertilized by two dissimilar sperms.The two eggs form two zygotes. and these twins therefore in addition  known as dizygotic.

the differces about the identical twins and the fraternal twins are that the indentical twins are nearly identical and the fraternal twins aren't identical.







conjoined (siamese) twins:
they are created exactly like identical twins,but during the split, the 
embryo dosn't disconnected completely to create to disconnected babies the twins develop attached to one another. 


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