Saturday, March 17, 2007

VARIANT GENES-IN-WAITING: Colorful caterpillars &tricky bits in evolution.

PZ Meyers at Seed Magazine. Random differences in gene code may pile up if they do no harm, but in effect lie in wait for an environmental difference to call them to action. And not just body form or function may be selected, but even the ability to be variable in a particular characteristic while growing up may be selected. Hot caterpillars grow up green, cool ones black.

read more | digg story

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