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molecular clock question

Don & bashford at scripps.edu
Fri Sep 6 14:44:01 EST 1991

The question of the validity of the molecular clock is different from
the question of evolutionary bursts.  Since a large proportion of DNA
bases are probably "silent" (i.e. mutations are neutral), it is
possible that genotype variation displays a meaningful and constant
rate while phenotype variation (if one had a measure of it) would
display bursts and have no meaningful rate.

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