Namhlanje, onke amadoda angamathandabuzo angakwazi ukufumana ulwazi malunga nobuncwane, ngenxa yendalo eyenziwa ngu-DNA ekhaya. Yintoni oku kuhlalutya, into efunekayo ekusebenzeni kwayo kunye nokunyaniseka kwesiphumo esikufumeneyo, siya kukuxelela kule nqaku.
Uvavanyo lwezilwanyana ekhaya
Ngexesha lokuqala ukuva malunga nokuhlalutya kwe-DNA kwintombi yasekhaya, abaninzi banokucinga ngento ethile kwimeko yebhubhoratri encinane okanye isistim efana novavanyo lokukhulelwa. Kodwa hayi, eqinisweni, uvavanyo lweDNA olwenziwe ngomzimba olubizwa ngokuba ngumzali lubizwa kuphela ngokuba ekhaya i-sampuluted sampled, eyathunyelwa kwi-laboratory. Enyanisweni, oku kuluhlu olukhethekileyo olunezintlu ezingasinyumba, iibhulebhu ezibalabala kunye nemiyalelo yevidiyo kunye nenkcazo ecacileyo yendlela yokufeza ngokufanelekileyo inkqubo yokuqokelela iiseli (buccal epithelium) ukusuka ngaphakathi kwehlathi. Ukuqokelela impahla yezinto eziphilayo kuyenziwa ngokusetyenziselwa uyise kunye nomntwana, iiseli zomama zenza lula ukufundisisa, kodwa aziqwalaselwe njengento enyanzelisayo. Emva kokufumana i-epithelium ye-buccal, ifakwe kwi-envelope ekhethekileyo kwaye ithunyelwe kwi-laboratory apho i-DNA kayise nomntwana ifaniswa ngokuthe ngqo.
Uhlalutyo kuthatha iintsuku (2-5) iintsuku. Iziphumo zichazwe ngqo kumthengi, njengoko ziyimfihlo yolwazi olungabonakaliyo kumalungu esithathu kunye nemibutho yoluntu. Ukuchaneka kwesi sifundo phantse kwi-100%. Kufuneka kwakhona kucaciswe ukuba ukuhlolwa kwe-DNA kwintombi yasekhaya, imvume ebhaliweyo yomama, uyise kunye nomntwana (emva kweminyaka eyi-16) iyimfuneko.
Ngokungathandabuzekiyo, ukufumaneka koviwo lokubambisana kubangele ukuhlaziywa kweengxabano eziphikisanayo. Ngakolunye uhlangothi, lithuba lokuba umntu onokungabaza abe nobuhlobo nomntwana, kwenye - ukungathembeki kwesicwangciso esinjalo kunokukhokelela ekuqhawuleni umtshato. Yingakho isigqibo sokugqithisa uvavanyo lwabazali kufuneka silinganiswe kunye kunye.