|MadSci Network: Genetics|
I am a high school science teacher. A colleague and I disagree on how identical the DNA of identical twins really is. I realize that the DNA is identical, but my colleague says not necessarily. Our high school science book says, "Barring mutations, identical twins have exactly the same genes." I interpret this as saying that yes, identical twins DO have identical DNA. My colleague believes that identical twins can never have identical DNA because there will always be mutations. This question came about when we were reviewing questions for the state high school graduation test. We would like to know the correct answer to tell our students. I have researched your material and all of your information says that the DNA is identical. I do feel, however, that he could have a valid point. Could you please settle this for us? Thank you for your time. Angela Brock
Re: Do identical twins REALLY have identical DNA?
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