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From: werner@aecom.UUCP (Craig Werner)
Newsgroups: net.bio
Subject: Re: Re: Morphological Asymmetry (Embryogenesis)
Message-ID: <1920@aecom.UUCP>
Date: Fri, 27-Sep-85 23:29:26 EDT
Article-I.D.: aecom.1920
Posted: Fri Sep 27 23:29:26 1985
Date-Received: Tue, 1-Oct-85 07:31:14 EDT
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Organization: Albert Einstein Coll. of Med., NY
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> > A more general question: how do cells in the embryo know "where
> > they are" on the body plan?  How does a cell know it's going to
> > be part of a big toe and not an eyelid? 
> > -- 
> > John Shipman/Zoological Data Processing/ucbvax!unmvax!nmtvax!shipman

> I've read some recent embryology; *nobody* knows yet.
>	-Robert Thau

	There are two so-called theories of morphogenesis. One is called
the 'European Model' -- your ancestors decide your fate, the other is the
'American Model' -- your neighbors determine what you become.

	In fact, in one organism, the nematode C. elegans, the complete
lineage of every cell has been determined, and it appears to follow no 
discernable rhyme or reason at the cellular level.  Maybe, at the molecular
level ..... 

-- 

				Craig Werner
				!philabs!aecom!werner
     "The proper delivery of medical care is to do as much Nothing as possible"


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