edit: The reason I find it an odd term is because human ancestry literally doesn’t follow a line. It always branches off, even if only to just include two parents. It’s a tree like structure, a line would misrepresent it

  • ABCDE@lemmy.world
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    5 days ago

    Could be to heighten the importance, but they are not exactly the same thing, as one is directly genetic. You may see the term used when talking about kings and queens.