Based on studies some twins are mentally and genetically connected that's why they know whether what the actions or what's happening to their other partner.
Identical twins develop from a single egg that splits into two.Identical twins can be so similar that their parents cannot tell them apart.
Not really.
Identical twins only have nearly identical DNA as environmental factors can switch genes on and off. These differences become more pronounced as the twins age.Sources:Segal, Nancy L. (1999). Entwined lives: twins and what they tell us about human behavior. New York: Dutton. ISBN 0-525-94465-6.Plomin, Robert (2001). Behavioral genetics. New York: Worth Pubs. ISBN 0-7167-5159-3.
It is hard to tell identical twins apart from each other. The apartment buildings in the complex are identical, and it is easy to get lost.
no identical is where you cant tell them apart and you can they are still indentical but u can tell them apart
No, they are ferternal. They have different colored eyes and one used to be shorter then the other. If you get any of their old movies you can tell. Mary-Kate usually has shorter hair then ashley, but that doesn't make them ferternal.
Twin studies tell us about nature, as they are very close biologically (identical twins). Adoption studies tell us about the effects of different upbringings on twins (some of which might be the same biologically[identical]).
They do look different! Even identical twins, with identical DNA, are different. Most have a slight difference in height and weight. Many people have a difficult time telling them apart because they are focusing on the wrong things. If someone looks only at the hair, they may not see that their faces are slightly different.
The ultrasound can determine if they are fraternal or identical. If they are identical then they will share a placenta and they may even share an amniotic sac. If they are fraternal they will have separate placentas. Sometimes it is difficult to see because of the membrane but the ultrasound is sophisticated and they normally can tell.
DNA testing...though to me, it makes more sense to wait until they're born before worrying about whether they're identical or not.
Not unless you're comparing it to your twin's DNA, and even then it only works if you're identical twins.
None of the Gosselin twins or sextuplets are identical, so it is easy to tell the Gosselin children apart.