Identical twins not as identical as believed

~ Jason Schwartz

A new snag in twin studies:

Contrary to our previous beliefs, identical twins are not genetically identical….

How can it be that one identical twin might develop Parkinson’s disease, for instance, but not the other? Until now, the reasons have been sought in environmental factors. The current study complicates the picture.

“Even though the genome is virtually identical in identical twins, our results show that there in fact are tiny differences and that they are relatively common. This could have a major impact on our understanding of genetically determined disorders,”

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Published by Jason Schwartz

I have been an addiction professional and social worker since 1994. I started blogging in 2005 as the Clinical Director at Dawn Farm. I currently serve as the Director of Social Work and Spiritual Care for a healthcare system. I've also served as the Director of Behavioral Health at another hospital. I'm also a lecturer at Eastern Michigan University’s School of Social Work. Views expressed here are my own. Keep in mind that the field, the contexts in which the field operates, and my views have changed over time.