The Origin of Species - By Means of Natural Selection, or the Preservation of Favored Races in the Struggle for Life #224778

di Charles Darwin

Forgotten Books

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Distinction between the sterility of first crosses and of hybrids Sterility various in degree, not universal, affected by close in terbreeding, removed by domestication — Laws governing the sterility of hybrids — Sterility not a special endowment, but incidental on other difierences, not accumulated by natural selection — Causes of the sterility of first crosses and of hybrids — Parallelism between the effects of changed conditions of life and of crossing — Dimorphism and trimorphism — Fertility of varieties when crossed and of their mongrel ofispring not uni versal — Hybrids and mongrels compared independently of their fertility — Summary.
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Altre informazioni:

ISBN:
9780259613114
Formato:
ebook
Editore:
Forgotten Books
Anno di pubblicazione:
2017
Dimensione:
12.6 MB
Lingua:
Inglese
Autori:
Charles Darwin