GENMSC-L Archives

Archiver > GENMSC > 1995-03 > 0794076525


From: Scott McGee <>
Subject: Re: genetic relatedness
Date: Wed, 1 Mar 1995 16:48:45 GMT


In article <3j0v2i$> (Rickste465)
writes:
> I don't know how to work it out mathematically, but I have heard a
>slightly different version of some of this. We each get 50% of our
>genetic material from each parent. But it was said somewhere that you
>have more in common genetically with any siblings than with either parent,
>since you and your siblings have the same genetic sources. Am I making
>any sense?
>
>Rick

Well, not quite right. You are guaranteed to be 50% related to each parent.
If we assume your sibling is a full sibling, he/she may be related by any
amount from 100% to 0%. 100% would be an identical twin (which can
[thoretically] happen with a seperate conception/birth) and 0% would be
where your sibling would get exactly the half you didn't from each parent.
This too is theoretically possible. Such a sibling would be of the opposite
sex, and would be no more related to you than your mother and father are
related.

This is all, of course, theoretical. In life, chances are you are pretty
close to 50% related to any sibling.

Scott

--
When in danger, | If it has my name on it, it must be MY opinion!
or in doubt, |______________________________________________________
run in circles, | Email: (Scott McGee)
scream and shout! | Web: http://www.cc.utah.edu/~sam8644/homepage.htm

This thread: