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  • Epigenetics

    From Ernest Major@{$to$}@meden.demon.co.uk to talk-origins on Sat Jun 20 16:47:00 2026
    From Newsgroup: talk.origins

    If you are willing to trust YouTube videos, an example of
    cross-generational epigenetics.

    https://www.youtube.com/shorts/EPgUw0AgImA

    If you cut flatworms in half the tail regenerates a new head and vice
    versa. If you have a two headed flatworm, and cut it in half, each half regenerates to a two-headed flatworm.

    In some (many?) plants life cycle stage information is maintained over propagation by cuttings. This is most obvious when there is distinct
    juvenile and adult foliage, but it's also known that plants raised from cuttings flower/fruit after fewer years than seed raised plants.
    --
    alias Ernest Major

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  • From John Harshman@john.harshman@gmail.com to talk-origins on Sat Jun 20 12:34:36 2026
    From Newsgroup: talk.origins

    On 6/20/26 8:47 AM, Ernest Major wrote:
    If you are willing to trust YouTube videos, an example of
    cross-generational epigenetics.

    https://www.youtube.com/shorts/EPgUw0AgImA

    If you cut flatworms in half the tail regenerates a new head and vice
    versa. If you have a two headed flatworm, and cut it in half, each half regenerates to a two-headed flatworm.

    In some (many?) plants life cycle stage information is maintained over propagation by cuttings. This is most obvious when there is distinct juvenile and adult foliage, but it's also known that plants raised from cuttings flower/fruit after fewer years than seed raised plants.

    Makes sense, since epigenetic markers are erased during gametogenesis,
    and thus are maintained when gametogenesis is bypassed.

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  • From Ernest Major@{$to$}@meden.demon.co.uk to talk-origins on Sun Jun 21 09:17:01 2026
    From Newsgroup: talk.origins

    On 20/06/2026 20:34, John Harshman wrote:
    On 6/20/26 8:47 AM, Ernest Major wrote:
    If you are willing to trust YouTube videos, an example of cross-
    generational epigenetics.

    https://www.youtube.com/shorts/EPgUw0AgImA

    If you cut flatworms in half the tail regenerates a new head and vice
    versa. If you have a two headed flatworm, and cut it in half, each
    half regenerates to a two-headed flatworm.

    In some (many?) plants life cycle stage information is maintained over
    propagation by cuttings. This is most obvious when there is distinct
    juvenile and adult foliage, but it's also known that plants raised
    from cuttings flower/fruit after fewer years than seed raised plants.

    Makes sense, since epigenetic markers are erased during gametogenesis,
    and thus are maintained when gametogenesis is bypassed.

    That's what I was thinking, but I hadn't come up with a way to express
    it succinctly. (I hadn't tried hard.)
    --
    alias Ernest Major

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