Changes in chromosomes or genes that cause offspring to have characteristics different from those of their parents. Mutations can be caused by the effects of chemicals, radiation, or even ordinary heat on DNA. Mutations produce some of the differences between members of a species on which natural selection acts.
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Example sentences from the Web for mutations
Over time, researchers were able to link many of these disorders with mutations in single genes.
Throughout the process the program throws in random changes in a command or variable— these are mutations.This is What Happens When You Teach Machines the Power of Natural Selection|James Barrat|February 1, 2014|DAILY BEAST
Also, there is proof that mutations in the human genome are not random, which opens the door for evolution with a purpose.
The mutations seem to have started in the second half of the 6th century in the case of the tenues.
Mutations are known to exist at present only among some domesticated animals and plants.The Science and Philosophy of the Organism|Hans Driesch
You should have seen Leicester's face as he watched the mutations of that beautiful countenance.Fashion and Famine|Ann S. Stephens
Coming now to birds we find several undoubted examples of mutations, or new forms which have come suddenly into being.The Making of Species|Douglas Dewar
The mutations of governments, like all human events, are constantly going on.Memoirs of Service Afloat, During the War Between the States|Raphael Semmes