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 xi
... OFFSPRING 119 INVERSE INHERITANCE . EARLY ORIGIN OF THE OVA • • 123 · 124 MARKED EFFECTS OF USE AND DISUSE ON THE INDIVIDUAL 126 WOULD NATURAL SELECTION FAVOUR USE- INHERITANCE ? . USE - INHERITANCE AN EVIL VARIED EFFECTS OF USE AND ...
... OFFSPRING 119 INVERSE INHERITANCE . EARLY ORIGIN OF THE OVA • • 123 · 124 MARKED EFFECTS OF USE AND DISUSE ON THE INDIVIDUAL 126 WOULD NATURAL SELECTION FAVOUR USE- INHERITANCE ? . USE - INHERITANCE AN EVIL VARIED EFFECTS OF USE AND ...
Página 2
... still more important question which we are about to consider . Will such modifica- tions be inherited by the offspring of the modified individual ? Does individual improve- ment transmit itself to 2 ARE THE EFFECTS OF USE INHERITED ?
... still more important question which we are about to consider . Will such modifica- tions be inherited by the offspring of the modified individual ? Does individual improve- ment transmit itself to 2 ARE THE EFFECTS OF USE INHERITED ?
Página 3
... offspring and on the race , the systematic moral training of individuals will in time produce a constitutionally moral race , and we may hope to improve mankind even in defiance of the unnatural selection by which a spurious but highly ...
... offspring and on the race , the systematic moral training of individuals will in time produce a constitutionally moral race , and we may hope to improve mankind even in defiance of the unnatural selection by which a spurious but highly ...
Página 39
... offspring was the exciting cause of a lowered vitality or disordered action , together with the ancestral liability to such diseases under such conditions . ( 4 ) Francis Galton says that " it is hard to find . evidence of the power of ...
... offspring was the exciting cause of a lowered vitality or disordered action , together with the ancestral liability to such diseases under such conditions . ( 4 ) Francis Galton says that " it is hard to find . evidence of the power of ...
Página 40
... offspring are not iden- tical in tendency with the changes effected in the parent by altered use or habit ( pp . 23-25 , 34 ) . But it is perfectly certain that the two sets of effects do not necessarily correspond . The effect of ...
... offspring are not iden- tical in tendency with the changes effected in the parent by altered use or habit ( pp . 23-25 , 34 ) . But it is perfectly certain that the two sets of effects do not necessarily correspond . The effect of ...
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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.