Their molecular structure is exactly the same, so it is easier to test a product on one of them whilst the other is a control- nothing is tested on it. It makes it much easier to compare the results.
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.
Because the mother identical twins each have a different husband . . . half of his characteristics show up in their babies.
Identical offspring are referred to as "monozygotic twins" or simply "identical twins." They arise from a single fertilized egg that splits into two embryos, resulting in genetically identical individuals. This contrasts with "dizygotic twins," or fraternal twins, which develop from two separate eggs fertilized by two different sperm. Identical twins share the same genetic material, while fraternal twins do not.
(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.
Identical twins do not necessarily have to run in the family. Identical twins occur at random, when a fertilized egg splits into two embryos, and this can happen to anyone regardless of family history.
Identical twins are helpful to researchers studying the contribution of genetics and environment to behavior. Since identical twins share 100% of their genetic material, any differences in their behavior can be attributed to environmental factors. Comparing identical twins raised in different environments can help tease out the influence of genetics versus environment on behavior.
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.
Twins are identical because they come from the same egg.
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.
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.