The writer is mainly of the opinion thattracingancienthumanslifeusingtheirDNA(A) istechnologicallypossiblethroughithas
Mainlydealswiththetopicon(A) theuseofancientDNAinanthropology.(B) thepastlifeoftheNeanderthals.(C) theroleofDNAinfossilstudies.(D) DNAresearchontheNeanderthals.(E) DNA engineering in the Max Planckģ2. With reference to thewhole text, thewriter Large chunksof Inuk'sgenome couldn'tbe filled inbecausehisDNAhadcrumbledintosmallpieces."Wewillfaceanuphillbattleintryingtoapplythistoalargenumberofhumanremains,"hesays.ģ1. StephanSchuster at Pennsylvania StateUniversity,who led thewoollymammoth genome project, thinks ancientgenomics isalreadyplateauing. Eventually theybecometoosmalltoreassemble,andall information is lost."Thereseemstobeatimehorizonof100,000years or so undermost preservation conditions duringwhich intactDNA survives,"Green says. As it ages, its long strands shred into ever smaller pieces. Somethingaboutthenatureofpastpeoplespossiblyevenwhattheylookedlike.Ancienthumangenomescouldgiveusinsightsintotheevolutionofourownspecies,explainingwhengenesinvolvedindiseaseandhighercognitiveskillsemerged.īut DNA is not forever.
If these genomesevermaterializeandthat'sabigiftheycouldleadtoabetterunderstandingofhowdifferenthominidspeciesarerelated,andwhenandwheretheybranchedoff.Ifthegeneticinformationisgoodenough,itmaytellus "Wearebasically startingon it rightnow,"he says. Ifwellpreserved bones can be found, a genomemight be possible,Willerslev says.Willerslev's laboratory has just received bones from Spain belonging to Homo heidelbergensis, thepredecessor toNeanderthals. Neanderthalsarenot theonlyhominidswhosegenomes couldbe sequenced, saysWillerslev.Homoerectus, a species that emerged inAfrica about 2million years ago, survived in eastAsia until less than100,000 years ago. GunakanPETUNJUKAuntukmenjawabsoalnomor31sampaidengannomor45! Text1ThefirstancientDNAsequencestobegathered3400basepairsfroma2400yearoldEgyptianmummywereaproofofprinciple.AfullgenomesequencewouldbefarmoreinformativeperhapsexplainingwhatkilledKingTut,forinstance.Atpresent,Inuk'sistheonlypublishedancienthumangenome.However,a team led by Svante Paabo and EdGreen at theMax Planck Institute for EvolutionaryAnthropology inLeipzig, Germany, will soon publish the complete genome sequence combined together from severalNeanderthals,frombetween38,000and70,000yearsago.
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