Identical twins come from the same fertilized egg; fraternal twins come from 2 fertilized eggs.
how does the genetic makeup of a fraternal and identical differ
The girl and boy twins are fraternal, meaning they are not identical.
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The words identical and fraternal are the opposites. These opposites can be compared to puppies and kittens or black and white for example.
Identical and fraternal twins typically share many similar characteristics
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.
Quads can be identical, fraternal, or a pair of identical twins. Identical quads are rare- that would require 1 egg divide into 2, and then divide again into two. Most quads are fraternal.
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.
i say that identical twins are the least rare because like me a fraternal twin i only know 1 pair of fraternal twin.
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.