Archiver > GENEALOGY-DNA > 2010-03 > 1268504160

From: "Ken Nordtvedt" <>
Subject: Re: [DNA] Clades, Definitions, Discoveries, FTDNA
Date: Sat, 13 Mar 2010 11:16:00 -0700
References: <><><><00e201cac145$82fec7c0$5e82af48@Ken1><><017901cac159$4e6c7020$5e82af48@Ken1><086F1093A566477B815995B401BB889C@HP><><><000601cac1f5$b5338040$5e82af48@Ken1><294168F50E07487A812B78EBD02BCBF4@HP><><BCC91D9EA86E43FCBF0F1AEAFB5CD7A7@HP><011b01cac212$8b6e9340$5e82af48@Ken1><65609D4617B84F15B9653A789115A218@HP><><6D9FD7E250D74B4B8D0B779135D3520B@HP>

----- Original Message -----
From: "Diana Gale Matthiesen" <>
> Yes, the descendants of a single common ancestor do form an evolutionary
> clade.

[[ Well, welcome on board ]]

[[ Later you say that "demographic groups" have more than one MRCA. Not
knowing what you have created with "demographic group" name, the discovered
evident y clades are descendants of a single male MRCA. I take no
responsibility for whatever you mean by demographic groups. We're talking
ydna here and male ancestral connections. ]]

[[ It probably serves no purpose to say, as you did, that every human
establishes a clade. If we are talking ydna clades, we probably want to say
that every male with at least two male offspring was technically MRCA of a
clade of the y tree of all males who ever lived. If he had two or more male
offspring with lines surviving up to today we can call him technically a
clade founder of the pruned y tree leading to today. What purpose is served
including males with zero or one male offspring? ]]

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