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Unformatted text preview: repressor peptide-What might be the evolutionary advantage of the loss of abdominal limbs in insects? o Less weight to carry, can spend the energy on other things, etc-What ecological pressures would promote hox genes to evolve new activities as opposed to simply altering something up or downstream? o Easier to alter an existing gene than to come up with a new pathway o Easier to lose something than to gain something-The loss of an entire peptide, thus converting Ubx into a constitutive repressor seems like it would require a significant mutation. Would this more likely have arisen from a single mutation or several smaller intermediate mutations?-Is there a homologous protein to Dll that could be used to regrow human limbs? o Tbx -Why might unx not be required for the suppression of limbs in parts of the body other than the abdomen? Caterpillars have legs and prolegs How do they do this????...
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