Human identical twins have the same DNA (e.g. identical genotype), but generally have slightly different phenotypes. In this way, you are in fact able to tell twins apart with some study of their features. While their DNA is identical (more or less), they do develop on their own after separation and on through life, making their outward appearances (or phenotype) slightly different.
In non-human species, this can be more difficult to discern, but the same does still apply.
Identical twins. Although horses sometimes have twins I'm not sure if they have identical twins.
If they were not then they would not be called identical twins!
Approximately 30 of twins are identical, also known as monozygotic twins.
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.
Twins are identical because they come from the same egg.
Identical twins are formed when one fertilized eggs splits. Non-identical twins are formed when two separate eggs are fertilized.
The same as when you had the first set of identical twins.
Non identical twins.
No.
the chances of having identical twins are about 1 in 300.
No, identical twins do not always share a placenta. In some cases, identical twins may have separate placentas.
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.