Kwemvelo Human: liyekile okanye akunjalo?

izazinzulu ezininzi echaphazelekayo ucingisise ngalo mbuzo: "Ngaba kwemvelo bayeka '? Inkoliso yabo ikholelwa ukuba impendulo ifanele ibe nguewe. Eneneni, xa sicinga le nkqubo yokhetho zendalo, ngoko mhlawumbi abantu bathungelane woyiswe ngokupheleleyo indalo kunye nokukwazi ukuzondla bona kunye nabantwana babo? Kwaye kukho inkqubela kwezonyango mihla, naziphi na amathandabuzo zinyamalale - ufika ukuphelela yayo.

Kodwa ke indawo enjalo linamanqaku yayo buthathaka. Banyebeleza akuthethi ukungabikho. kwemvelo Modern - inkqubo kakhulu kade, ngoko kunzima kakhulu ukuba ukulandelela ngexesha lenene. Ngaphezu koko, phezu Kwingcingane izindlu kukhokelela kwisigqibo okuphikisana iziphumo zophando ufuzo zabantu.

Intsingiselo elula elithi "kwemvelo" ithi ukuba inkqubo yokutshintsha nezihlandlo alleles kwindawo enabantu ngokuhamba kwexesha. Inkoliso yolo tshintsho kukutshintsha omnye allele enye phantsi kwempembelelo ukhetho zendalo. Ukuze ubone indlela zazivelela yabantu ihamba, lwanele ukufumana naziphi na iimpawu allele frequency utshintsho kwigenome.

izifundo kutshanje bavunyelwe ukuchaza ezinye weyona mizekelo ngokumangalisayo nasekusungulweni zabantu mihla.

Okokuqala - lo kwendawo ebizwa njalo-. Izizwe azinza kwiindawo weentaba zehlabathi, bejamelene oksijini yaneleyo kule emoyeni. ukungalali esinjalo sikhokelela ukudinwa, isiyezi kunye ugwayi. Kwiimeko kakhulu, iziphumo zibe ayibuyiseki umva - nokudumba yemiphunga kunye nokufa enzima ezilandelayo. Kwaye zokungaqheli uyakwazi ukususa yinxalenye kuphela ye-iimpawu.

Ngethuba lokwenza uphando kwafunyaniswa ukuba abantu bomthonyama ka Tibet bebeziqhelanisa iimeko ezikhoyo ngokohlobo yokunqongophala kwe-oksijini. Kuye kwafunyaniswa ukuba uninzi Tibetan oxygen igazi Ukwanda-10%, xa kuthelekiswa nabantu abaqhelekileyo. Lo msebenzi ilifa, ngoko ngokukhuselekileyo bacebise ukuba kuxhomekeke isakhi esinye.

Omnye umzekelo okuphawuleka ukunganyamezelani lactose. It is a carbohydrate leyo ifumaneka kuphela ubisi ezanyisayo. It ifunxwe emzimbeni womntu ngoncedo enzyme - yelactose, apho iveliswa ngokuzimisela kunyaka wokuqala wobomi, emva koko Yindibanisela iziyobisi ophezu buyaphela. Uninzi yelactose abadala abafundanga kuhlanganiswa, ke ngoko, i-lactose leyo kwelifunekayo phantse.

Okumangalisayo kukuba, i-American amaNdiya, Avstraliyskie Aborigeny, abemi South-East Asia kunye nakumazantsi Afrika baphethwe ukusela ubisi yonke. Yenza nokuqunjelwa, urhudo, eliba, ukugabha kunye isicaphucaphu. Ngelo xesha linye bangayidlayo iimveliso zobisi, njengoko inkqubo ibile uyazifohloza phantsi lactose.

Ukukwazi ukugaya lactose ebudaleni abantu bathenga kumazwekazi ezimbini ezahlukeneyo - Europe kunye naseMntla Afrika. Ngelo xesha linye Besuka ngokuzimeleyo ngalinye kwaye kuvela kwindawo ezahlukeneyo zofuzo. Le guquko kabini waba ngumqondiso ethembekileyo ukuba zazivelela womntu eqhubeka.

ingqalelo eyodwa kufuneka ihlawulwe kwi ingxaki kwe-AIDS. A ubhubhane we esi sifo, eziqale 80s, uye waba ngomnye wemiba ezinkulu lweendawo mzuzu. Phantse 40 million. Abantu ubunzima kwesi sifo, kwaye ubhubhane incopho kumazantsi eAfrika, apho malunga ne-25% yabantu abadala abosulelekileyo.

Kuye kudlule zigaba ezininzi kwemvelo - kodwa isitshixo i zivunywa. Ukuba omnye wemiba le ukuvela AIDS, ekubeni ithetha ethile iinkqubo ukuguquka, ekukhuseleni esi sifo. Kwaye, mhlawumbi, ekuhambeni kwexesha, umzimba womntu kwakhiwa imichiza ethile enokuthi ngempumelelo ukujongana nesi sifo esinganyangekiyo.

Imvelaphi kunye ngendaleko womntu yathatha ngaphezu kwewaka leminyaka. Ebudeni beli xesha, siye sanda umthamo ingqondo, watshintsha iimpawu, saqalisa ukuba sihambe ngqo, bafunda ukuthetha. Yonk 'imihla senza ukuphuhlisa, bafumane izakhono ezintsha kunye nobuchule ukuba balwe ngempumelelo esi sifo uze uzame ukuba baphile kwihlabathi entsonkothileyo, ngoko ke asikwazi ukuba yendaleko wayeka, oko nje kancinci isantya ikhondo layo.