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macromutation

[ mak-roh-myoo-tey-shuhn ]

noun

, Genetics.
  1. a mutation that has a profound effect on the resulting organism, as a change in a regulatory gene that controls the expression of many structural genes.
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Word History and Origins

Origin of macromutation1

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Example Sentences

The first animal to be segmented—to go from just a single body to a body with two segments—must have been a macromutation.

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