Panmixia might in such instances lower the general average to what has been termed the "birth mean.
Panmixia can not account for the reduction of the color, since it returns in some species when they are exposed to the light, and disappears to a certain extent in others when kept in the dark.
You will see that I took up a decided stand upon the principle of Panmixia not being able altogether to supersede that of disuse.
If there be no difference between Panmixia and Cessation of Selection, from what I have briefly sketched about it, it follows that, had Darwin lived till now, he would almost certainly have been opposed to Weismann.
Thirdly, according to my view of the action of panmixia as previously explained, no total discharge of colouration is likely to be caused by such action alone.
At first sight, these differences appear simply ludicrous; but on seeking for the reasons of them, we find that they are due to different views touching the manner in which panmixia operates.
Thus it is evident that if panmixiabe suggested in explanation of the discharge of colouring in cave-faunas, the continuance of colour in deep-sea faunas appears to show the explanation insufficient.
This is the Panmixia of Professor Weismann and his followers; but the phrase regression to mediocrity through the cessation of selection appears to me preferable.
It seems that all the admitted objections to degeneration by panmixia apply with equal force to germinal selection.
Chologaster is in a stage of panmixia as far as the eye is concerned.
Before going further, objections may again be raised against the universal assumption that the cessation of use and the consequentpanmixia was a sudden process.
Panmixia is the indispensable precondition of the whole process; for, owing to the fact that persons with weak determinants are just as capable of life as those with strong, .
He clearly admits the cessation of selection or panmixia in that those born with defects may breed with the others.
The results in Chologaster are due to panmixia and the limited degree of use to which the eye is put.
Footnote 84: The problem is very easily solved if we seek assistance from the principle of panmixia developed in the second essay ‘On Heredity.
Such a sifting process would certainly greatly quicken the rate of degeneration due topanmixia alone.
An apparent increase in this liability might arise from greater attention being now paid to it, or from increased use of harder roads; or a real increase might be due to panmixia and some obscure forms of correlation.
The great reduction in the weight of female jaws and skulls evidently points to sexual selection and to panmixiaunder male protection.
So with the eyes of cave animals, panmixia could only cause an imperfection of vision equal to the average of those variations which occurred, say, during a century before the animal entered the cave.
I maintain is, thatpanmixia alone could not reduce a swallow's wings below this first average.
My dear Mr. Poulton,--As topanmixia you have quite misunderstood my position.
If what has been urged above be valid, panmixia cannot have been operative; sincepanmixia per se only brings about regression to mediocrity.
But if there is truth in what I have already urged on this head, panmixia will not adequately account for the facts.
CN] Even granting that panmixia could continuously reduce the size of ducks' wings, it is not easy to see how it could get rid of immortality.
If panmixia alone cannot, to any very large extent, reduce an organ no longer sustained by natural selection, to what efficient cause are we to look?
The essence of the idea of panmixia is that, when the natural selection which has raised an organ to a high functional level, and sustains it there, ceases or is suspended, the organ drops back from its high level.
Unless, therefore, some cause be shown why the negative variations should be prepotent over the positive variations, we must, I think, allow that unaided panmixia cannot affect any great amount of reduction.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "panmixia" in a variety of sentences. We hope that you will now be able to make sentences using this word.
