These were the result of the natural selection from among natural mutations.

We've just agreed that the difference couldn't be due to ordinary natural mutation, but nevertheless it's there.

A natural mutation could not have done this and exactly this."

Whether these strains are natural mutations or the product of human tampering is unclear.

Some rare individuals of this parrotfinch have the entire head and face blue, apparently due to a natural mutation.

This is because the natural mutation rate of an allele is almost always much lower than 1%.

But sometimes differences arise as a result of natural mutation and uncontrolled cross-pollination in the wild.

"Whether it's a natural mutation or was caused by a magical incantation, I don't know.

But natural mutations would have produced some semi-tough stalks that held the seeds more firmly in place.

When natural mutations show up, we leave them on trial for a long time before we attempt to spread them around through the race.

These were sports, or natural mutations.

The next plague may be from a newly discovered infectious agent or a natural mutation that produces a new version of an old microbe.

Several million years passed before anthropoids came into being through natural mutations, but after that the hominids underwent a lightning-like development.

Phylogenetically, an almost impossible natural mutation andfar too complex for an accidental experiment gone awry.

"An unprecedented mutation did indeed occur on Minerva, but it was not a natural mutation.

Discovered at the beginning of the Taishō period when natural mutation and separation of some black kōji to white was observed.

Blood oranges are a natural mutation of the C. sinensis, although today the majority of them are hybrids.

The work had been based on a natural mutation of the pineal gland, Terrence Cee explained.

Natural mutations seem to occur spontaneously throughout the world; wherever large numbers of plants are being produced, bud-sports will occur.

Paula Red is a natural mutation of the McIntosh apple that ripens late in the summer.

All slans are natural mutations.'

The taillessness arose as a natural mutation on the island, though folklore persists that tailless domestic cats were brought there by sea.

The long-lived Ames and Snell mice carry natural mutations that make them deficient in growth hormone.

"Natural mutation?"

He stood watching her as she pushed the name plates 'Samuel Lann' and then 'Natural Mutation.'