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Whenever the zygoat (fertilized egg) starts mitosis (cell division) it creates two zygoats. These two zygoats are exactly the same in looks and DNA.

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Margarette Ratke

Lvl 13
2y ago
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Wiki User

12y ago

This is not a probability questions but a biological question and, of course, not all sets of twins are identical.

If the twins are identical, this means that a single fertilized egg split in two before it started developing into a fetus. As a result, both twins have identical genetic information. If they are not identical, then this means that two eggs were in the uterus at the same time and that they were both fertilized separately from one another. Thus they almost certainly have different genetic information.

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Q: Why do twins have identical characteristics?
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Related questions

Why wont the babies look the same if identical twins have babies with identical twins?

Because the mother identical twins each have a different husband . . . half of his characteristics show up in their babies.


How many different kid of twins are there?

there are two types of twins-- fraternal and identical. Fraternal twins are genetically unique, and they usually have physical differences. Identical twins are identically identical, such as a clone, and have exact physcial characteristics, excluding weight and scars etc.


What is one way in which identical and fraternal similar?

Identical and fraternal twins typically share many similar characteristics


What are two horses with identical genes called?

Identical twins. Although horses sometimes have twins I'm not sure if they have identical twins.


Why identical twins are similar?

If they were not then they would not be called identical twins!


Why are identical twins identical and fraternal twins are not?

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.


Why are the identical twins different?

Because genes do not account for every trait or characteristic. Some characteristics are influenced by environment.


How are twins identical?

Twins are identical because they come from the same egg.


Why are identical twins and fraternal twins not the exact same?

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.


How do you get identical and non identical twins?

Identical twins are formed when one fertilized eggs splits. Non-identical twins are formed when two separate eggs are fertilized.


If I had identical twins 3 years ago what are my changes of having another set of identical twins?

The same as when you had the first set of identical twins.


Do identical twins have identical footprints?

No.