GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2002-10 > 1033844220


From: "John F. Chandler" <>
Subject: Re: [DNA] Mutations
Date: Sat, 5 Oct 2002 14:57 EDT
In-Reply-To: jorbob@msn.com message <DAV105HMwVN7miR9Odu00014bbf@hotmail.com> of Fri, 4 Oct 2002 13:12:18 -0600


All,
There is a widespread tendency to use the term "two-step mutation"
very loosely. Its strict meaning is a particular event in which the
length of a particular marker changed by two repeats, but a lot of
people also use the same term when referring to a total distance of
two steps anywhere between two haplotypes. You cannot assume that the
term has been used correctly by someone asking for help in interpreting
new DNA results. Please make allowances for this uncertainty when
offering such assistance.

John Chandler

This thread: