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From: werner@aecom.UUCP (Craig Werner)
Newsgroups: net.bio
Subject: Re: Human Genetics (a query)
Message-ID: <1828@aecom.UUCP>
Date: Sat, 3-Aug-85 02:24:35 EDT
Article-I.D.: aecom.1828
Posted: Sat Aug  3 02:24:35 1985
Date-Received: Sun, 4-Aug-85 04:57:40 EDT
References: <241@weitek.UUCP>
Organization: Albert Einstein Coll. of Med., NY
Lines: 19

> I have a question about biology that some netter should be able to
> answer:  Do human X and Y chromosomes recombine?
> 
	They do, but whether that is in fact normal or innapropriate
recombination, I do not know.

	However, one thing makes much of the implications moot. One, the Y
ain't much of a chromosome. It might be the smallest one. (the numbers go
from largest to smallest, except that 21 is smaller than 22 - it used to be
thought otherwise, and by the time it was discovered, 21 was so intrenched
as the chromosome associated with Down's Syndrome, they decided to be 
inconsistent rather than confusing.)
	Even if it isn't the smallest one, it is mostly heterochromatin, i.e.
inactive.

-- 
				Craig Werner
				!philabs!aecom!werner
		"The world is just a straight man for you sometimes"