GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2010-03 > 1269892912
From: (John Chandler)
Subject: Re: [DNA] Family Finder Test
Date: Mon, 29 Mar 2010 16:07:13 -0400
> Isn't this assuming a double crossover between an autosome pair?
Yes, for simplicity. The number of crossovers, as I mentioned, is
> I would imply from examples I've seen in genetics texts on
> constructing linkage maps that single crossovers are much more
> likely, i.e. a single chiasmata rather than multiple chiasmata.
Examples in texts are constructed to illustrate concepts, and not
to confuse the reader with unnecessary complication.
Incidentally, the word "chiasmata" is plural!