Petrels (a flying and diving seabird)are thought to be one of the closest living relatives to penguins.What type of genes would be most likely to exhibit different expression patterns between these species?

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Genes controlling skeletal development would be most likely to exhibit different expression patterns between petrels and penguins, as the structures and shapes of their bones are adapted differently for their respective flying and diving lifestyles.

Petrels (A Flying and Diving Seabird)are Thought to Be One