Path: utzoo!mnetor!uunet!husc6!think!ames!ucsd!sdcc6!calmasd!jnp
From: jnp@calmasd.GE.COM (John Pantone)
Newsgroups: sci.bio
Subject: Re: Sexual selection
Message-ID: <2701@calmasd.GE.COM>
Date: 29 Mar 88 18:35:15 GMT
References: <1566@mmm.UUCP> <3138@arthur.cs.purdue.edu> <1164@microsoft.UUCP> <2534@saturn.ucsc.edu>
Organization: G.E.- Calma R&D, San Diego, CA
Lines: 14
Summary: please check your facts

> Sex ratios at birth are ALWAYS nearly even, at least for mammals.
> This is a biological "fact". 

Not so.  Check   this month's issue  of  Natural History  for a   very
interesting survey of "manipulated" sex ratios.  Depending on what you
mean by "nearly" this is  not true for  humans, either.   There  are a
statistically significant  number of "excess" males born  - by the age
of  reproduction the ratio   has evened out  -  males  have  a  higher
mortality.

-- 
These opinions are solely mine and in no way reflect those of my employer.  
John M. Pantone @ GE/Calma R&D, 9805 Scranton Rd., San Diego, CA 92121
...{ucbvax|decvax}!sdcsvax!calmasd!jnp   jnp@calmasd.GE.COM   GEnie: J.PANTONE