Evolutionary-Developmental Biology

Differences in spatial expression patterns of genes

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Unformatted text preview: developmental processes to be independent o Example: giraffe’s neck has the same number of vertebrae as other mammals, but the bones grow for a longer period, making them larger. • Differences in spatial expression patterns of genes regulating a module can lead to evolutionary change. o Webbed feet in ducks results from an altered spatial expression pattern o Chickens and ducks both have webbing initially. Both express BMP4, a protein that instructs cells in the webbing to undergo apoptosis. But they differ in their spatial expression patterns of BMP4 inhibitor protein called Gremlin. o Programmed cell...
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