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Thread: What does it mean when a group of people have the same haplogroup?483 days old

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    Question What does it mean when a group of people have the same haplogroup?

    What does it mean when a group of people have the same haplogroup?

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    It means that they likely descend from a specific small group of people thousands of years ago.
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    Quote Originally Posted by andresasj View Post
    What does it mean when a group of people have the same haplogroup?
    The haplogroup is the set of people, and the haplotype is what they all have in common. It is a genetic variant passed along a branching ancestral set of lines of males (Y-DNA) or a branching ancestral set of lines of females (mtDNA), where the root is a single common ancestor who lived thousands of years ago. The haplogroup otherwise doesn't have anything in common, and it doesn't mean much.
    Last edited by ApostateAbe; 2018-04-21 at 03:01.

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    Quote Originally Posted by andresasj View Post
    What does it mean when a group of people have the same haplogroup?
    It means that they are both descended from a common ancestor who lived something like 50,000 years ago, and depending on the age of the haplogroup's subclades, they also share a TMRCA (The Most Recent Common Ancestor) from somewhere around the past 5,000 years ago or so.
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    Quote Originally Posted by andresasj View Post
    What does it mean when a group of people have the same haplogroup?
    They belong to the same family; and if they share similar autosomal results- usually[not all the time] share the same language, customs and physical traits.

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    Quote Originally Posted by ApostateAbe View Post
    The haplogroup is the set of people, and the haplotype is what they all have in common. It is a genetic variant passed along a branching ancestral set of lines of males (Y-DNA) or a branching ancestral set of lines of females (mtDNA), where the root is a single common ancestor who lived thousands of years ago. The haplogroup otherwise doesn't have anything in common, and it doesn't mean much.
    That's true. It means a single common ancestor. Autosomal DNA gives a much better idea about your ancestry.

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    It's a tracing of mutations via DNA which supposedly does not recombine (though that only truly apply to MtDNA) thus a lineage can be established. There are some uncertainties, as it had been demonstrated that there can be a sort of bleed over of MtDNA from sperm cells, as they have mitochondria. However, in most cases, people only have one type of MtDNA, or at least that's what is assumed.

    If populations are truly discrete, then especially MtDNA is a powerful tool in establishing differentiation, estimation of age of separation and general classification/definition of populations as species and subspecies. For humans it's more complicated, as we're the most widespread mammal on earth. We tend to travel around and basically a Y-DNA lineage can be introduced into a population via just one guy, analogous to the spread of a surname from a single ancestor.

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