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2013-03-02 20:29:10
2013-03-02 20:29:10

Identical twins come from one egg and one sperm. Fraternal twins come from two eggs and two sperm.

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Related Questions


identical twins are born at the same time AND look the same l. Fraternal twins are born at the same time but do not look identical..


No. Identical twins are identical. Fraternal twins are not.


There is no precise percentage of fraternal or identical twins but it is estimated that 2/3 of all twins are fraternal where as 1/3 of twins are identical.


Identical twins would look the same, fraternal twins could be of different sexes. In the womb, you can easily tell the difference between fraternal and identical twins because if the twins are identical, they will share the same sac. Fraternal twins will have different sacs. You can see this in the ultrasound. After birth, it is often very difficult to tell the difference between the two types of twins because babies often look alike particularly when they are siblings even if they aren't identical genetically. If the twins are fraternal it usually gets easier to tell the difference as they get because they tend to look quite different as they age. Fraternal twins are only siblings while identical twins are genetically identical.


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.


No that's why theyre called fraternal twins. Identical twins are identical (share the exact same genes) while fraternal twins are as similar to each other as normal siblings are.


If two (or more) eggs are fertilised and develop together you will get fraternal twins. Identical twins are the result of a single fertilised egg dividing into two embryos.



In identical twins, the DNA is identical, which is what makes them identical. In Fraternal twins it is not.


Twins are not necessarily identical. They can be fraternal as well. Identical twins result when one fertilized egg splits in two. Fraternal twins result from two fertilized eggs.


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


Identical twins, due to the fact that the one fertilized egg splits, have identical DNA. Fraternal twins, since they are from separate eggs, have different DNA.


If two eggs are fertilsed you get fraternal twins whereas if one egg is fertilised and that develops into two individuals, you get identical twins.


Fraternal and identical twins.


(Person that asked the question)-Once twins are born, and old enough to determine whether they are identical or fraternal, how do you know if they are identical, or just fraternal twins that look identical? I was just curious.


There are two types of twins- fraternal and identical. Fraternal twins are only siblings born at the same time. Identical twins started as 1 egg that split in two after being fertilized. The DNA of identical twins is, well.... identical. At one point, they WERE the same person.


how does the genetic makeup of a fraternal and identical differ


identical twins are single egg twins. fraternal twins a two egg twins. fraternal


Any set of twins that are not identical (whether it's boys or girls or a combination of the two) are fraternal twins.


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


No, identical twins do, but fraternal twins come from 2 separate eggs.



No; if twins are fraternal then they can't be identical.


i say that identical twins are the least rare because like me a fraternal twin i only know 1 pair of fraternal twin.


No, their twins are all fraternal



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