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- Haldanes_rule abstract "Haldane's rule is an observation in the early stage of speciation. It was formulated in 1922 by the British evolutionary biologist J.B.S. Haldane. Haldane's Rule states that in a species hybrid if only one gender is inviable or sterile, this is more likely to affect the heterogametic sex, that is, the sex that has two different, rather than two identical, sex chromosomes (in mammals, for example, this would be the male, since males have XY sex chromosomes, females have XX).Haldane himself described the rule as:When in the F1 offspring of two different animal races one sex is absent, rare, or sterile, that sex is the heterozygous sex (heterogametic sex).Haldane's rule applies to the vast majority of heterogametic organisms examined, including when two species, where secondary contact in an area of sympatry results in incomplete reproductive isolation, form hybrids after allopatric speciation has occurred. The rule include both male heterogametic (XY or XO-type sex determination, such as found in mammals and Drosophila) and female heterogametic (ZW-type sex determination, such as found in birds and Lepidoptera), and some dioecious plants such as Silene. It appears to be a general pattern associated with heterogamety.Hybrid dysfunction (sterility and inviability) is a major form of post-zygotic reproductive isolation, which occurs in early stages of speciation. Evolution can produce a similar pattern of isolation in a vast array of different organisms. However, the actual mechanisms leading to this result in divergent taxa remains largely undefined. The basis by which the heterogametic sex becomes more susceptible to hybrid inferiority (sterility or inviability) has been a focus of theoretical and empirical explorations that have aided understanding of sexual reproduction and speciation.".
- Haldanes_rule thumbnail J._B._S._Haldane.jpg?width=300.
- Haldanes_rule wikiPageExternalLink haldane1.htm.
- Haldanes_rule wikiPageExternalLink query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=3921852&query_hl=1&itool=pubmed_docsum.
- Haldanes_rule wikiPageID "623379".
- Haldanes_rule wikiPageLength "13314".
- Haldanes_rule wikiPageOutDegree "40".
- Haldanes_rule wikiPageRevisionID "681595819".
- Haldanes_rule wikiPageWikiLink Allopatric_speciation.
- Haldanes_rule wikiPageWikiLink Asian_elephant.
- Haldanes_rule wikiPageWikiLink Bird.
- Haldanes_rule wikiPageWikiLink Birds.
- Haldanes_rule wikiPageWikiLink Category:Evolutionary_biology.
- Haldanes_rule wikiPageWikiLink Category:Works_by_J._B._S._Haldane.
- Haldanes_rule wikiPageWikiLink Dioecy.
- Haldanes_rule wikiPageWikiLink Diploid.
- Haldanes_rule wikiPageWikiLink Drosophila.
- Haldanes_rule wikiPageWikiLink Evolutionary_biology.
- Haldanes_rule wikiPageWikiLink File:Arctiidae_caterpillar_edit.jpg.
- Haldanes_rule wikiPageWikiLink File:Elephas_maximus_(Bandipur).jpg.
- Haldanes_rule wikiPageWikiLink Haplodiploids.
- Haldanes_rule wikiPageWikiLink Haplodiploidy.
- Haldanes_rule wikiPageWikiLink Hermaphrodite.
- Haldanes_rule wikiPageWikiLink Hermaphrodites.
- Haldanes_rule wikiPageWikiLink Heterochromatin.
- Haldanes_rule wikiPageWikiLink Heterogametic_sex.
- Haldanes_rule wikiPageWikiLink Hybrid_(biology).
- Haldanes_rule wikiPageWikiLink J.B.S._Haldane.
- Haldanes_rule wikiPageWikiLink J._B._S._Haldane.
- Haldanes_rule wikiPageWikiLink Lepidoptera.
- Haldanes_rule wikiPageWikiLink Mammal.
- Haldanes_rule wikiPageWikiLink Maternal_effect.
- Haldanes_rule wikiPageWikiLink Meiotic_drive.
- Haldanes_rule wikiPageWikiLink Ploidy.
- Haldanes_rule wikiPageWikiLink Reproductive_isolation.
- Haldanes_rule wikiPageWikiLink Sex-determination_system.
- Haldanes_rule wikiPageWikiLink Sex_linkage.
- Haldanes_rule wikiPageWikiLink Sexual_reproduction.
- Haldanes_rule wikiPageWikiLink Sexual_selection.
- Haldanes_rule wikiPageWikiLink Silene.
- Haldanes_rule wikiPageWikiLink Speciation.
- Haldanes_rule wikiPageWikiLink Species.
- Haldanes_rule wikiPageWikiLink Sterility_(physiology).
- Haldanes_rule wikiPageWikiLink Sympatry.
- Haldanes_rule wikiPageWikiLink X-inactivation.
- Haldanes_rule wikiPageWikiLink X-linked.
- Haldanes_rule wikiPageWikiLink X0_sex-determination_system.
- Haldanes_rule wikiPageWikiLink XO_sex-determination_system.
- Haldanes_rule wikiPageWikiLink XY_sex-determination_system.
- Haldanes_rule wikiPageWikiLink ZW_sex-determination_system.
- Haldanes_rule wikiPageWikiLink Zygote.
- Haldanes_rule wikiPageWikiLink File:Drosophila_repleta_lateral.jpg.
- Haldanes_rule wikiPageWikiLink File:J._B._S._Haldane.jpg.
- Haldanes_rule wikiPageWikiLink File:White_campion_close_700.jpg.
- Haldanes_rule wikiPageWikiLinkText "Haldane's rule".
- Haldanes_rule hasPhotoCollection Haldanes_rule.
- Haldanes_rule wikiPageUsesTemplate Template:Biological_rules.
- Haldanes_rule wikiPageUsesTemplate Template:Cite_journal.
- Haldanes_rule wikiPageUsesTemplate Template:Cite_web.
- Haldanes_rule wikiPageUsesTemplate Template:EngvarB.
- Haldanes_rule wikiPageUsesTemplate Template:Quote.
- Haldanes_rule wikiPageUsesTemplate Template:Reflist.
- Haldanes_rule wikiPageUsesTemplate Template:Speciation.
- Haldanes_rule wikiPageUsesTemplate Template:Technical.
- Haldanes_rule wikiPageUsesTemplate Template:Use_dmy_dates.
- Haldanes_rule subject Category:Evolutionary_biology.
- Haldanes_rule subject Category:Works_by_J._B._S._Haldane.
- Haldanes_rule hypernym Observation.
- Haldanes_rule type Aircraft.
- Haldanes_rule comment "Haldane's rule is an observation in the early stage of speciation. It was formulated in 1922 by the British evolutionary biologist J.B.S. Haldane.".
- Haldanes_rule label "Haldane's rule".
- Haldanes_rule sameAs Haldanovo_pravilo.
- Haldanes_rule sameAs Haldanes_Regel.
- Haldanes_rule sameAs Regulo_de_Haldane.
- Haldanes_rule sameAs Regla_de_Haldane.
- Haldanes_rule sameAs Regra_de_Haldane.
- Haldanes_rule sameAs 홀데인_규칙.
- Haldanes_rule sameAs Haldanes_regel.
- Haldanes_rule sameAs Regra_de_Haldane.
- Haldanes_rule sameAs m.02xrx1.
- Haldanes_rule sameAs Haldanes_regel.
- Haldanes_rule sameAs Q1570701.
- Haldanes_rule sameAs Q1570701.
- Haldanes_rule sameAs 霍尔登氏法则.
- Haldanes_rule wasDerivedFrom Haldanes_ruleoldid=681595819.
- Haldanes_rule depiction J._B._S._Haldane.jpg.
- Haldanes_rule isPrimaryTopicOf Haldanes_rule.