Are the Effects of Use and Disuse Inherited?: An Examination of the View Held by Spencer and DarwinMacmillan, 1890 - 58 páginas |
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28 LAFAYETTE PLACE acquired characters alleged ancestral Animals and Plants ants appears artificial selection attributed birds ble Number bones breeds cause cent Charles Darwin civilization Cloth cumulative Descent diminished diminution diseases Double Number duck Edward Clodd effects of disuse enlarged Essays evidence evil eyes fact factor of evolution faculties favored Fitzgerald Galton gemmules Grant Allen Herbert Spencer heredity HUMBOLDT PUBLISHING Huxley increased individual inheritance of acquired inherited effects INHERITED INJURIES inherited mutilation instincts J. F. C. Hecker jaws leg-bones legs lengthened LL.D lower incisors modifications natural or artificial natural selection nervous offspring Origin of Species pangenesis panmixia parents pigeons Plants under Domestication Proctor Prof quasi-inheritance rabbit race reduced wings reduction reproductive elements Richard Chenevix Trench Science sexual selection shortened social Special number spite of disuse sternum structure suppose tameness teeth tendency theory thickened soles tion transmission transmit use-inheritance Variation of Animals weight Weismann William Kingdon Clifford wing-bones
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Página 15 - For peculiar habits confined to the workers or sterile females, however long they might be followed, could not possibly affect the males and fertile females, which alone leave descendants. I am surprised that no one has hitherto advanced this demonstrative case of neuter insects, against the well-known doctrine of inherited habit, as advanced by Lamarck.
Página 15 - The case, also, is very interesting, as it proves that with animals, as with plants, any amount of modification may be effected by the accumulation of numerous, slight, spontaneous variations, which are in any way profitable, without exercise or habit having been brought into play. For peculiar habits, confined to...
Página 37 - I think there can be no doubt that use in our domestic animals has strengthened and enlarged certain parts, and disuse diminished them ; and that such modifications are inherited.