Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Tsarin halittar mutum na mutum ya samo asali ne daga duka nau'ikan kwayoyin halittarsa da kuma tasirin yanayin da ya rayu. Babban ɓangare na bambancin phenotypic a cikin yawan jama'a yana haifar da bambancin genotypic. Tsarin juyin halitta na zamani ya bayyana juyin halitta a matsayin canji a tsawon lokaci a cikin wannan bambancin kwayar halitta. Yawan wani allele zai zama mafi yawa ko žasa dangane da wasu siffofin wannan kwayar halitta. Bambanci ya ɓace lokacin da sabon allele ya kai wurin gyarawa - lokacin da ya ɓace daga yawan jama'a ko kuma ya maye gurbin allele na kakannin gaba ɗaya. Zaɓin yanayi zai haifar da juyin halitta ne kawai idan akwai isasshen bambancin kwayoyin halitta a cikin yawan jama'a. Kafin a gano ilimin halittar Mendelian, wata ka'ida da aka saba amfani da ita ita ce hada gado. Amma idan aka yi amfani da bambancin halittar jini, za a rasa bambancin da ke cikin kwayoyin, kuma hakan zai sa ba za a iya gaskatawa da juyin halitta ba. Ka'idar Hardy-Weinberg ta ba da mafita ga yadda ake kiyaye bambancin a cikin yawan jama'a tare da gadon Mendelian. Yawan allele (canji a cikin kwayar halitta) zai kasance ba zai canzawa ba idan babu zaɓi, canji, ƙaura da kuma jigilar kwayoyin halitta. Bambanci ya fito ne daga maye gurbi a cikin kwayar halitta, sake sake kwayar halitta ta hanyar haifuwa ta hanyar jima'i da ƙaura tsakanin al'ummomi (juzu'in kwayar halitta). Duk da ci gaba da gabatar da sabon bambancin ta hanyar maye gurbi da kwararar kwayar halitta, yawancin kwayoyin halittar jinsin iri iri ne a cikin dukkan mutane na wannan jinsin. Koyaya, koda ƙananan ƙananan bambance-bambance a cikin kwayar halitta na iya haifar da bambance-bambance masu ban mamaki a cikin phenotype: alal misali, chimpanzees da mutane sun bambanta da kusan 5% na kwayoyin halittar su.  Tambaya: Mene ne ra'ayin bayyanau?
canji a tsawon lokaci