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

seedmagazine.com — 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. Mar 17, 2007 View in Crawl 4