A common notion is that twins who share same womb and genes should be identical. However, such is not the thing, revealed a research being carried out by Murdoch Children's Research Institute (MCRI), Australia.

The study researchers said that environmental factors are quite influential and they bring such changes that twins act different, yet being similar. Lead researcher Dr. Jeffrey Craig said that it is a big revelation, which will clear doubts of many mothers, who have been expecting twins, or just have given birth to them.

Genes do get affected by environmental factors and the process of affecting the same is known as epigenetic tagging. It is a chemical procedure, which acts as a switch and changes its mode as per the situation.

"It's been known for some time that identical twins - twins with the same DNA sequences - can look different, can behave different and can have different health conditions", said Craig.

In order to reveal about the above given finding, the study researchers said that they took blood samples from umbilical cord of identical twins and to cross check the same, they did the same from non-identical twins. Evaluation revealed that even identical twins were different in their own way.