Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne AB Allele?
Name: Wanda
Status: Educator
Age: 50s
Location: N/A
Country: N/A
Date: August 2004

When I was doing my clinical training in 1976, I recall reading an article about a person of Polish descent having both AB antigens on only one allele.Do you have any knowledge of this case?r

I haven't heard of this particular case, but it sounds like a case of unequal crossing-over during meiosis whereby one chromatid ends up with a duplication of this chromosome locus (thus carrying both alleles) and the other chromatid with a deletion of this locus.

Regards, Ron Baker, Ph.D

Click here to return to the Molecular Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory