The Law of Heredity: A Study of the Cause of Variation, and the Origin of Living OrganismsJ. Murphy, 1883 - 336페이지 |
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19개의 결과 중 1 - 5개
5 페이지
... Asexual and sexual heredity - Possibility of an explanation of heredity- Characteristics which are now hereditary were at one time new variations - Heredity and variation are opposite aspects of the same problem - We may hope that a ...
... Asexual and sexual heredity - Possibility of an explanation of heredity- Characteristics which are now hereditary were at one time new variations - Heredity and variation are opposite aspects of the same problem - We may hope that a ...
11 페이지
... asexually , and the offspring thus produced inherit , like those developed from eggs , all the characteristics of the parent . This then is the problem of heredity , certainly one of the grandest secrets of nature . When we reflect upon ...
... asexually , and the offspring thus produced inherit , like those developed from eggs , all the characteristics of the parent . This then is the problem of heredity , certainly one of the grandest secrets of nature . When we reflect upon ...
16 페이지
... asexual generation and from ova . 2. Ova may develop , in certain cases , without fertili- zation . 3. As a rule the ... asexually CHAPTER II. ...
... asexual generation and from ova . 2. Ova may develop , in certain cases , without fertili- zation . 3. As a rule the ... asexually CHAPTER II. ...
17 페이지
... asexually , is essentially like its ancestors , although it may be quite different from its immediate ancestor , as in cases of alternation . 6. Organisms produced from fertilized ova differ in the following points from those produced ...
... asexually , is essentially like its ancestors , although it may be quite different from its immediate ancestor , as in cases of alternation . 6. Organisms produced from fertilized ova differ in the following points from those produced ...
51 페이지
... asexual reproduction as well . We should have a simple explanation of the manner in which the characteristics of a remote ancestor may suddenly reappear after they have been dormant for many generations . We should understand how the em ...
... asexual reproduction as well . We should have a simple explanation of the manner in which the characteristics of a remote ancestor may suddenly reappear after they have been dormant for many generations . We should understand how the em ...
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acquired action adult alike allied species ancestor ancestral form asexual asexual reproduction become birds body breed characteristics color common conclusion confined crossing crustacea Daphnia Darwin Darwin says descendants domesticated animals domesticated pigeons embryo epigenesis evolution existence experience explanation fact female fertilized fortuitous fowls functions furnishes gemmules genera genus germ germinative vesicle give rise gradually greatly hereditary homology horns hybrid hydroids hypothesis individual influence inherited insects latent male cell male element males of allied medusa ment modification natural selection offspring ordinary origin origin of species ovum pangenesis parent parthenogenesis peculiarities perfect phenomena plants plastidules plumage present produced pure race reasons for believing reciprocal crosses reproductive elements resemblance result secondary sexual characters sexes sexual elements sexual reproduction sexual selection similar simply striped structure tendency to vary theory of heredity throw off gemmules tion transmission transmit true variable various young