Asweknown,allcellsinourbodyhavethesameDNA,however,eveniftheyhaveexactlythesameDNA,whyareeyesandlungssodifferent?TheanswerlieswithwhatDNAisandhowitworks.

　　Human'sDNAcontainsalloftheinformationneededformakingyou.Thisinformationisstoredintheover30,000humangenesfoundinalmostallyourcells.Therefore,togetattheinformation,agenemustbeturnedon(expressed)andtheinformationturnedintosomethinguseful,aprotein.Oncemade,thatproteingoesoutintothecellandperformssomesetofspecifictasks.Forexample,hemoglobin,aproteinfoundinredbloodcells,carriesoxygentocellsandcarbondioxideaway.

　　Foracelltowork,1000'softheseproteinsmustbemade,eachdoingitsparticularjob.Eyesandlungsaresodifferentbecausedifferentsetsofproteinsaremadeinthevariouseyeandlungcells.Inotherwords,intheeye,genesareturnedonforseeingandthe"breathing"genesareoff.Inlungcells,thesituationisreversed.

　　。。。大哥你写的太多了就给我2行写。。。

　　AltoughallourbodycellscontainthesameDNA,human'sgeneswillexpressitindifferentwaysandthentheinformationfromtDNAcanbereleases.Aspecificproteinwillbemadeduringthisprocess,anditwillturnintodifferenttypesofcellsfortheirspecificfunctions.