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Name: David P.
Status: Educator
Age: 40s
Location: N/A
Country: N/A
Date: May 2004


Question:
Although well out of the realm of my topic areas (mathematics and computer applications), one of my students asked if I had heard of two human eggs fertilizing each other. He claims that it is a rare but possible phenomenon. Is such an occurrence possible? If so, where can I learn more on this topic.



Replies:
Were your students perhaps watching the season finale of CSI??? They dealt with a rapist who kept escaping prosecution because his semen DNA type did not match his blood DNA type. Of course, he was caught in the end! I believe your students are referring to the rare occurrence of human chimeras. They are actually the result of 2 embryos fusing into one, instead of two eggs fusing. More info can be found at this link:

http://www.nature.com/nsu/020429/020429-13.html

vanhoeck



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