Are the Effects of Use and Disuse Inherited?: An Examination of the View Held by Spencer and DarwinMacmillan, 1890 - 156 páginas |
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Página x
... NERVOUS DISORDERS INDIVIDUAL AND TRANSMISSIBLE TYPE NOT MODIFIED ALIKE · PAGE 34 35 36 40 DARWIN'S EXAMPLES 45-100 REDUCED WINGS OF BIRDS OF OCEANIC ISLANDS DROOPING Ears and DETERIORATED INSTINCTS WINGS AND LEGS OF DUCKS AND FOWLS ...
... NERVOUS DISORDERS INDIVIDUAL AND TRANSMISSIBLE TYPE NOT MODIFIED ALIKE · PAGE 34 35 36 40 DARWIN'S EXAMPLES 45-100 REDUCED WINGS OF BIRDS OF OCEANIC ISLANDS DROOPING Ears and DETERIORATED INSTINCTS WINGS AND LEGS OF DUCKS AND FOWLS ...
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... nervous system of a guinea - pig is occasionally inherited may be a fact of " considerable weight , " or on the other hand it may be entirely irrelevant . Cases of this kind strike one as peculiar exceptions rather than as examples of a ...
... nervous system of a guinea - pig is occasionally inherited may be a fact of " considerable weight , " or on the other hand it may be entirely irrelevant . Cases of this kind strike one as peculiar exceptions rather than as examples of a ...
Página 36
... NERVOUS DISORDERS . Mr. Spencer infers that , because insanity is usually hereditary , and insanity can be artificially produced by various excesses , therefore this arti- ficially - produced insanity must also be hereditary ( p . 28 ) ...
... NERVOUS DISORDERS . Mr. Spencer infers that , because insanity is usually hereditary , and insanity can be artificially produced by various excesses , therefore this arti- ficially - produced insanity must also be hereditary ( p . 28 ) ...
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... nervous sys- tems by prolonged overwork or in some other way , have children more or less prone to nervousness . " The following observations will , I think , warrant at least a suspension of judgment concerning this particular form of ...
... nervous sys- tems by prolonged overwork or in some other way , have children more or less prone to nervousness . " The following observations will , I think , warrant at least a suspension of judgment concerning this particular form of ...
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... nervous families would be liable to suffer from nervous prostration , and by the ordinary law of heredity alone would transmit nervousness to their children . ( 3 ) The shattered nerves or insanity resulting from alcoholic and other ...
... nervous families would be liable to suffer from nervous prostration , and by the ordinary law of heredity alone would transmit nervousness to their children . ( 3 ) The shattered nerves or insanity resulting from alcoholic and other ...
Otras ediciones - Ver todas
Términos y frases comunes
acquired characters acquired modifications alleged Animals and Plants appears artificial selection atavism attributed Aylesbury duck become birds bones breeds cause cent civilization concomitant variation Contemporary Review Crown 8vo cumulative Darwin Descent deterioration diminished diminution diseases domestic animals domestic rabbit duck effects of ancestral effects of disuse enlarged epilepsy evidence evil explanation eyes fact factor of evolution fancy pigeons father favoured Francis Darwin Francis Galton Galton gemmules guinea-pigs heredity Illustrations improvement incisors increased individual inherited effects inherited injuries inherited mutilations insects instances instincts jaws Lamarckian leg-bones legs lengthened muscles natural or artificial natural selection nervous neuter offspring organs Origin of Species pangenesis panmixia parents pigeons Plants under Domestication quasi-inheritance race Ray Lankester reduced wings relative reproductive elements sexual selection shortened Spencer spite of disuse spontaneous variations sternum structure suppose tameness teeth tend tendency theory thickened sole tion toes transmit true inheritance use-inheritance Variation of Animals weight Weismann wing-bones
Pasajes populares
Página 26 - 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.