Population Frequence of Hg E & J and its subclades

That's interesting. Still the problem with Y-crhomosome and Mithocondrial DNA analysis is that they only show the direct patrilineal and matrilineal ancestor. So of my 4 grandparents only two are reflected in these kind of studies (1 for the Y chromosome and another for the Mt-DNA), of my 8 great-grandparents again only 2 are apparent, of my 16 great-grandparents still only 2 are reflected in these studies, etc. As you go far back in time the proportion of relevance becomes less and less significant.

One can imagine that, on random bases, eventually most of the ancient lineages would be anyhow reflected in a population through Y and Mt DNA but that's not necessarily true: any maternal lineage with only male offsprings is not reflected in Mt-DNA, if these male offsprings have (at some stage) only female ones, their genetic aportation is still relevant but their inheritance is not reflected in either Y chomosome or Mithocondrial DNA studies.

Still it will be reflected in wider studies that focus in all the genome, not just in strict patrilineal and matrilineal inherited genes. While it's curious to know about patrilineal and matrilineal ancestors... this may be almost irrelevant when it comes to study the true nature of the genetic pool of any population.

(Sidenote: recently some doubts have arised about Y chromosome not recombining... it may well be that Y, at least occasionally, recombines with X choromosome during fecundation)


Edited by Maju