“outofafrica”model,multiregionalevolutionmodel,aswellassomemediationmodels.althoughtherearenotmanydivergencesintermsoftheoriginofhomoerectusamongthesehypothesis,thecontroversyontheoriginofhomos.sapieremai.onemodel,themultiregionalevolutionmodel,positsagradualtraitionfromhomoerectustoanatomicallymodernhumathroughouttheoldworld.incontrast,the“outofafrica”modelhypothesizesthatanatomicallymodernhumaarosefromasmall,isolatedpopulationinafrica,readoutofafrica,andreplacedindigenoush.erectuspopulatioineurasiaandaustralasia.whilemediationmodelhypothesizesthathomos.sapiearosefromthegeneticadmixtureofhomosapiewhichcamefromafricaaswellasthelocalones.plentyofpalaeoarchaeologicalfoilshavebeenfoundineastasia,eeciallyinchina,whichshowsdistinctivecontinuitytemporallyandmorphologically.therefore,eastasiahasbeenafocalpointinthestudyoforiginofmodernhuma.tosearchforevidenceofapoibleindependentoriginofmodernhumaninchina,9988maleindividualsweresampledacro
chinesemainlandantypedforthreeychromosomebiallelicmarker(m89,m130andyap)onthenonrecombinationofychromosome.resultbasedonourstudiespresentsthatalltheindividualscarryamutationatoneofthethreesites.thesethreemutatio(m89t,m130tandyap)coalescetoanothermutation(m168t),whichwasoriginallyderivedfromafrica,asnosingleindividualwasfoundthatcarriesalinkageolderthanm186toutsideafrica.inotherwords,allychromosomesamplesfromchina,withnoexception,wereoriginallyderivedfromalinkageofafricaorigin.hence,weconcludethatevenaveryminorcontributionofin-situhominido