TWINS

TWINS

How does identical twins are created?

Identical twins happen when a fertilized egg splits into two separate babies – usually whithin the first twelve days of mom’s pregnancy. After twelve days, the egg may not split entirely and result in conjoined twins.

Are they really identical?

There are two main factors that cause identical  twins not to be trually identical:

·     Identical twins share the same DNA – but don’t have identical DNA. When the egg splits into two halves to form identical twins, the DNA may not divide equally between the two cells. The basic concept is similar to when you cut an apple in half, the two halves may not look the same.

·     Enviromental factors both prenatal  after  the babies are born.

What are the differences between twins and identical twins?

Identical twins will almost always be of the same sex however, non identical  twins don’t have to be necessarily of the same sex, they can be a girl and a boy. 

Here I have copy a picture and a video about twins, I hope you like it!