About Careers MedBlog Contact us

No Two People are Alike, Not Even Identical Twins: Study

by Tanya Thomas on March 31, 2011 at 9:30 AM
Font : A-A+

 No Two People are Alike, Not Even Identical Twins: Study

A new study involving an Indian-origin researcher has found that no two people are alike, even if they're identical twins.

Molecular geneticist Shiva Singh, from The University of Western Ontario, has been working with psychiatrist Richard O'Reilly to determine the genetic sequencing of schizophrenia using identical or monozygotic twins.


Singh looked at about one million markers of identical twins (and their two parents) where only one twin had schizophrenia.

"The most informative feature of schizophrenia is that it sometimes runs in the family," says Singh, noting in the general population about one percent have schizophrenia.

"We started with the belief that monozygotic twins are genetically identical, so if one member of identical twins has schizophrenia, then the risk for the other twin should be 100 percent, if it's all due to genes. However, studies over the years have shown that the risk of the disease in both twins is only 50 percent." That means either the twins are genetically not identical or the familial disease involves non-genetic (random) effects.

Singh found about 12 per cent of DNA can vary across individuals, "Cells are dividing as we develop and differentiate. More importantly, these cells may lose or acquire additional DNA. The genome is not static," he added.

The study is published in this month's PLoS ONE.

Source: ANI
This site uses cookies to deliver our services.By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use  Ok, Got it. Close

No Two People are Alike, Not Even Identical Twins: Study Personalised Printable Document (PDF)

Please complete this form and we'll send you a personalised information that is requested

You may use this for your own reference or forward it to your friends.

Please use the information prudently. If you are not a medical doctor please remember to consult your healthcare provider as this information is not a substitute for professional advice.

Name *

Email Address *

Country *

Areas of Interests