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Matches in Harvard for { ?s ?p 19. Sterility: the contradiction : Cross-sterility ; Genotypic defects ; Sterility of XY sex ; Segregational sterility ; Genetic isolation ; Gene hybrids and structural hybrids ; Triploids ; Pairing and non-pairing ; Fertility of tetraploids ; Sterility and discontinuity -- 20. Apomixis: the escape : Non-fertilisation [fertilization] and non-reduction ; haploid parthenogenesis ; Facultative and obligatory parthenogenesis ; Remedy for sterility ; Genetic versatility ; Pseudogamy ; Competition of embryos ; Segregation in apomictics ; Selection for non-reduction ; Sub-sexual reproduction -- 21. The integration of the cell : Interactions ; Individuality of nucleus ; Specificity of timing ; Cytoplasmic trigger ; Organisers [organizers] ; Merogony ; Distant hybrids ; Dauermodifikation ; Contrast of plants and animals ; Organellae ; Plastid inheritance and mutation ; Invisible particles ; Matrilinearity ; Plasma effects -- 22. Types of plasmagene : Male breakdowns ; Age breakdowns ; Heredity and development -- 23. Heredity and infection : Higher organisms ; Proviruses ; Microbes ; Bateriophages ; The bacterial chromosome ; Gene-virus cycle ; Cancer ; Particle genetics -- 24. The evolution of heredity : Levels of integration ; Protogenic, genic, sexual ; Origin of meiosis ; Necessity of crossing-over ; Postponement of meiosis ; Diplophase ; Heterokaryosis ; Parasexual reproduction ; Conservatism of coordinated systems ; Interlocking reactions in evolution ; Cryptic species ; External stability, internal change ; Kinds of selections ; Cell-selection -- 25. Initiative in evolution : Lamarck, Darwin and sex ; Pre-adaptation ; Nonadaptive radiation ; Drift or drive ; Breakdown of classical theory ; Planning of genetic systems.. }

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