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Unformatted text preview: hkrYo('tr developmental programs (and embryonic structures) are modular aliowing Egdfpqlens T? ch a n q es i n, ti ming b r t (citi-oirnf exp ress i o n of deveiopmehtat control $enes can lead to changes in structure developmental control genes can acquire new functions (see Ubx examPle) changes in developmental programmes are the reason for'macroevolutionary changes' in animal anatomy (new anatomical features, new phyla)...
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- Fall '09