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Identical Twins?
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Identical twins are formed when the egg splits into two as opposed to regular twins that are formed from two separate eggs. This means that they have exactly the same genes. They will have the same blood group, same eye and hair colour etc. However, as they grow they will be subjected to different stimuli and may be exposed to different environments that will allow for differences to appear.
For instance if one was to be put on steroids as a youngster, for some medical condition, it could stunt their growth. A difference in diet could also affect the way they grow, as could other medical conditions that are suffered by one and not the other.
So, in answer to your question, yes they are still identical twins and always will be.
Sometimes I wonder, when identicals look very different, is if there were two eggs but they implanted one on top of the other, hence allowing only one placenta and one bag for them to grow in.
Here's another opposite example...Fraternal twins with part chinese mother and part maori mother. When they were first born one looked like a little chinese baby, with a very round face, and brown in colouring. The other one, like his father with a longer slimmer face and very fair in colour. (both boys) 6 weeks later you could not tell them apart. They looked even more identical than many id twins. Later there was a little bit of a difference so that if you saw them both together you could be pretty dure you got the names right, but when apart not so sure.
So it is fascinating .....
There is a good chance they are identical though.. the differences you point out about these twins are all environmental. You said the older twin was shorter.. maybe he smoked, took medication, lifted weights whilst he was still growing.. as alot of things can stunt your growth these days.. also, if one twin is slightly stockier anyway.. or slightly heavier.. his face and neck will probably have extra fat or muscle.. which in turn makes it look a different shape.
This means that although they are identical twins 9if they are!!) then they only look different due to things that happned after they were born.. things to do with the way they have lived and the things around them....
for example.. if two identical twins are completely different complexions.. one may use the sunbed twice a week and the other may wear sunscreen all the time.. or just not go on the sunbed!! sounds stupid but its the same thing!! environmental differences, not genetic!
hope that helps