chapter04 Chromosome theory of inheritance

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1、Chapter4TheChromosomeTheoryTheChromosomeTheoryofInheritanceofInheritanceCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredtoreproduceordisplay4-1OutlineofChapter4OutlineofChapter4ObservationsandexperimentsthatplacedtheObservationsandexperimentsthatplacedthehereditarymateria

2、linthenucleusonthehereditarymaterialinthenucleusonthechromosomes.chromosomes.MitosisensuresthateverycellinanorganismcarriesMitosisensuresthateverycellinanorganismcarriessamesetofchromosomes.samesetofchromosomes.MeiosisdistributesonememberofeachchromosomeMeiosisdistributesonememb

3、erofeachchromosomepairtogametecells.pairtogametecells.GametogenesisGametogenesis,theprocessbywhichgermcells,theprocessbywhichgermcellsdifferentiateintogametes.differentiateintogametes.Validationofthechromosometheoryofinheritance.Validationofthechromosometheoryofinheritance.Copyr

4、ight©TheMcGraw-HillCompanies,Inc.Permissionrequiredtoreproduceordisplay4-2ThechromosometheoryofinheritanceThechromosometheoryofinheritanceProposedbyWalterS.Suttonin1902ProposedbyWalterS.Suttonin1902--1903.1903.““ChromosomemovementsparallelthebehaviorChromosomemovementsparallelth

5、ebehaviorofMendelofMendel’’sgenes.Chromosomesarelikelytosgenes.Chromosomesarelikelytocarrythegeneticmaterialcarrythegeneticmaterial..””Confirmedinthefollowing15yearsthroughConfirmedinthefollowing15yearsthroughstudiesonthefruitflystudiesonthefruitflyDrosophilaDrosophilamelanogaste

6、rmelanogaster..ThetheorytransformedtheconceptofageneThetheorytransformedtheconceptofagenefromanabstractparticletoaphysicalreality.fromanabstractparticletoaphysicalreality.Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredtoreproduceordisplay4-3Evidencethatgenesresideinthenu

7、cleusEvidencethatgenesresideinthenucleus16671667––AntonvanLeeuwenhoekAntonvanLeeuwenhoekSemencontainsspermatozoa(Semencontainsspermatozoa(““spermanimalsspermanimals””))HypothesizedthatspermmayentereggtoachieveHypothesizedthatspermmayentereggtoachievefertilization.fertilization.

8、Copyright©TheMcGraw-HillCompanies