SETI bioastro: The genetic signature of (astronomically induced) life extinctions

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From: LARRY KLAES (ljk4_at_msn.com)
Date: Fri Sep 30 2005 - 16:31:23 UTC

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    Paper (*cross-listing*): q-bio.PE/0509033
    Date: Sat, 24 Sep 2005 18:02:26 GMT (60kb)

    Title: The genetic signature of (astronomically induced) life extinctions

    Authors: Robersy Sanchez and Rolando Cardenas

    Categories: q-bio.PE astro-ph q-bio.QM

    Comments: 9 pages, 4 figures

    Subj-class: Populations and Evolution; Astrophysics; Quantitative Methods
    \\
    The current understanding of supernova and gamma-ray burst events suggests
    important effects on the biosphere if one of more of them happened to strike
    the earth in the past. In this paper we evaluate the possibility that life
    extinctions which probably occurred due to excess of radiation occurring in
    the
    geologic past might have left a genetic signature on surviving species. We
    emphasize the signatures of these extinctions, proposing a quantitative
    model
    to evaluate the surviving probability of the species, based on kinetic
    aspects
    of the frequency of mutations and the DNA repair rate.

    \\ ( http://arXiv.org/abs/q-bio/0509033 , 60kb)

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