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Chromosomal Organization

David Adler dadler at u.washington.edu
Tue Dec 6 23:31:07 EST 1994

> hirshaut at yu1.yu.edu wrote:
> : ...What, however, is known about chromosome organization?
> : It would seem logical that genes with related functions share
> : a single chromosome.  Is there, in fact, any information
> : so far that confirms this assumption?...

and, In article <3c0p82$58r at decaxp.harvard.edu> robison at lipid.harvard.edu  
(Keith Robison) writes:

> However, the trend seems to be that genes with related function are only
> clustered if they are directly related by duplication.  For example,
> the HOX genes occur in nice little clusters whose structure is largely
> conserved between flies and man.  But the HOX genes are all related to
> each other by duplication.  

But even more interesting, I think, and not explained by the duplication  
origin of the homeotic clusters, is the situation of the fly Ant/bithorax  
cluster and its mouse homolog. Within these clusters the order of the  
individual genes on the chromosome (map) is paralleled by the order of  
expression, anterior-posterior, of these genes in the embryo. And, this  
parallel relationship between ordered chromosomal arrangement and spatial  
expression pattern is conserved from fly to mouse! 
Curious, yes?
David A. Adler                  Pathology SM-30
University of Washington        Seattle, WA 98195
(206) 543-0716 (phone)		(206) 543-3644 (fax)
"Science is nothing but trained and organized common sense"

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