mutation
n. C / Un. a change in the genetic code of a living thing. This change can sometimes lead to new physical traits or health conditions.
n. a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Often results from errors during DNA replication or exposure to environmental factors.
The mutation caused the flower to turn blue.
Scientists are studying the genetic mutation that allows some people to see more colors than others.
While many genetic mutations are neutral or even harmful, some provide a survival advantage that eventually spreads through a population via natural selection.
Late 14th century as Middle English mutacioun, from Latin mūtātiō, both directly and via Old French mutacion.
Countable when referring to a specific genetic change; uncountable when discussing the process of changing.