panmixia

Weismann has emphasized this idea in his doctrine of "panmixia," or the withdrawal of selection, which always results in degeneration.

Q. E. D., or New Light on the Doctrine of Creation George McCready Price

Thus what Weismann terms "panmixia," or free intercrossing, will co-operate with Galton's law of "regression towards mediocrity," and the result will be that, whenever selection ceases to act on any part or organ which has heretofore been kept up to a maximum of size and efficiency, the organ in question will rapidly decrease till it reaches a mean value considerably below the mean of the progeny that has usually been produced each year, and very greatly below the mean of that portion which has survived annually; and this will take place by the general law of heredity, and quite irrespective of any _use_ or _disuse_ of the part in question.

Darwinism (1889) Alfred Russel Wallace 1868

I suppose it is inevitable that one day they will develop the technology to track a fish the size of an eel through thousands of meters of water, and that someone will go down in a submersible and film the giant orgy (referred to by scientists as a panmixia) that is imagined to take place in the Sargasso Sea.

James Prosek: 'Eels': The World's Most Mysterious Fish James Prosek 2010

I suppose it is inevitable that one day they will develop the technology to track a fish the size of an eel through thousands of meters of water, and that someone will go down in a submersible and film the giant orgy (referred to by scientists as a panmixia) that is imagined to take place in the Sargasso Sea.

James Prosek: 'Eels': The World's Most Mysterious Fish James Prosek 2010

I suppose it is inevitable that one day they will develop the technology to track a fish the size of an eel through thousands of meters of water, and that someone will go down in a submersible and film the giant orgy (referred to by scientists as a panmixia) that is imagined to take place in the Sargasso Sea.

James Prosek: 'Eels': The World's Most Mysterious Fish James Prosek 2010

I suppose it is inevitable that one day they will develop the technology to track a fish the size of an eel through thousands of meters of water, and that someone will go down in a submersible and film the giant orgy (referred to by scientists as a panmixia) that is imagined to take place in the Sargasso Sea.

James Prosek: 'Eels': The World's Most Mysterious Fish James Prosek 2010

On the other hand, biological isolating mechanisms cannot be perfected, in general, unless panmixia is prevented by at least temporary establishment of geographic barriers.

The Song of The Dodo David Quammen 2004

On the other hand, biological isolating mechanisms cannot be perfected, in general, unless panmixia is prevented by at least temporary establishment of geographic barriers.

The Song of The Dodo David Quammen 2004

If we ignore such factors as selection, panmixia, correlation, and the effects of use and disuse during lifetime, and still regard the case of the domestic duck as a valid proof of the inheritance of the effects of use and disuse, we must also accept it as an equally valid proof that the effects of use and disuse are _not_ inherited.

Are the Effects of Use and Disuse Inherited? An Examination of the View Held by Spencer and Darwin

Under domestication there would be a suspension of the previous elimination of reduced breast-bones by natural selection (Weismann's panmixia), and a diminution of the parts concerned in flying might even be favoured, as lessened powers of _continuous_ flight would prevent pigeons from straying too far, and would fit them for domestication or confinement.

Are the Effects of Use and Disuse Inherited? An Examination of the View Held by Spencer and Darwin