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Identical twins are formed from a single egg that splits into two. Fraternal twins are formed from two separate eggs that are both separately fertilized. So identical twins have identical DNA, and fraternal twins do not.

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Q: Why are identical twins and fraternal twins not the exact same?
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Related questions

What is the difference fraternal and identical twins?

Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.


What is identical and what is fraternal?

Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.


What are fraternal twins?

Fraternal twins are two siblings that have the same birth day, but do not look identical.


Are female twins that are not identical called Fraternal or Maternal?

Female twins that are not identical are called fraternal twins. Fraternal twins occur when two separate eggs are fertilized by two separate sperm. Maternal twins refer to twins that share the same mother but can include both identical and fraternal twins.


What kinds of twins are there?

Identical and Fraternal There are identical and fraternal. Fraternal twins happen when 2 different embryos start growing at the same time, so you get a brother and a sister or 2 sisters or 2 brothers that are the same age. Identical twins happen when 1 embryo splits into 2 embryos when it is only a few cells big, so both babies have the same genes.


Why Can fraternal twins be different gender but identical twins are always the same gender?

fraternal twins have two different chromosomes


Is the DNA in twins the same?

Twins can have very similar DNA, especially in identical twins who come from a single fertilized egg that splits into two. On the other hand, fraternal twins are no more similar genetically than any other siblings. Some slight genetic differences can arise due to mutations that happen after the initial egg fertilization.


Why can fraternal twins different genders but identical are always the same gender?

fraternal twins have two different chromosomes


Do Identical twins think more alike than Fraternal?

Yes. Fraternal twins don't look alike at all. Identical, meaning to look the same, are well, identical.


Was Esau and Jacob identical twins?

No, Esau and Jacob were not identical twins. They were fraternal twins, meaning they were born from the same pregnancy but did not have the same genetic makeup.


Was Shakespeare's twins identical?

No. All identical twins are the same sex. Judith and Hamnet were opposite sexes, and so were fraternal twins.


What is twins developing from the same egg cell called?

identical twins, as opposed to fraternal.