Haveyoueverwonderedwhytherearesomanyskincolorsintheworld?Doyouknowwhypeoplelivinginparticularareasusuallyhaveacertaincolor?Biologyandhistoryarethetworeasonsforthis.
Skincontainssomethingcalledmelaninwhichdeterminesaperson’sskincolor.Themoremelaninapersonhasthedarkerhisorherskinwillbe.Theamountofandtheproductionofmelaninarecontrolledbygeneticsbutcanbeaffectedbyotherthingssuchassunlight.Ifapersonlivesinaplacewithlesssunlightaperson’sbodywillproducelessmelaninmakingtheskinlighter.
Skincolorisalsoaffectedbyanothersource----vitaminD.humansallneedvitaminDtobuildbones.PeoplecangetitbyeatingfoodssuchasfishandmilkorfromsunlightsosunlightabsorbedbymelanincannotbeusedforvitaminDproduction.Thereforeadark—skinnedpersonwillproducelessvitaminDthanalight—skinnedpersonwhentheyreceivedthesameamountofsunlight.
TheconnectionbetweenvitaminDproductionandskincolorisclearwhenwelookatevolution.TheearliesthumanslivedinAfricatheirdarkskinproducedlessvitaminDbecauseoftheirdarkskin.AsaresulttheirskinmadelessmelaninsotheycouldgetenoughsunlighttoproducevitaminD.theirskingraduallygotlighterandtheylosthair.NowpeoplelivinginareaswithstrongsunlightlikeAfricahavedarkerskinwhilepeoplelivinginotherareashavelighterskin.TheexceptiontothisistheInuitwholiveinaplacewithlittlesunlightbuthavedarkskinbecausetheyeatalotoffishandhaveenoughvitaminD.
Evolutionhasgivenusarainbowofskincolors.Humanshavealwayshadmelanintodetermineourskincolor.Whathaschangedthroughhistoryistheenvironmentwherewehavelived.Thishasinturnchangedourmelaninproductionandeventuallyskincolor.
Brief 1Peoplelivinginaparticular 2 usuallyhavethesameskincolorandtherearemanydifferentskincolorsintheworld.
Reasonforskin color
Thereasonsfordifferentskincolorsmainly 3 inbiologyandhistory.
Biologyreasons
Theamountofmelaninbywhichaperson’sskincoloris__4 variesfrompeopleto people.Themoremel