Kuv muaj lag ntseg dawb miv?

Raws li yog lub npe hu, nyob rau hauv cov xwm, tshwj xeeb tshaj yog cov tsiaj qus, dawb xim nyob rau hauv cov tsiaj yog tsis tshua muaj tsis tshua muaj. Qhov kos yog tej zaum hais tias tus inhabitants ntawm lub ncov qaumteb qabteb latitudes, qhov twg cov xim yog ua los ntawm tej yam ntuj tso xaiv tau ntau tiam. Tab sis tus miv tuaj ntawm teb chaws Africa, thiab lawv twb Ameslikas xim av. Lawv plaub yog brownish tau txais kev pab raws li kev tiv thaiv los ntawm lub scorching hnub, raws li tau zoo raws li nkaum rau ntsiag to ntes tau lawm thiab feem ntau mus nkaum los ntawm loj ua npua. Yuav ua li cas, ces, yuav muaj sia nyob ib tug dawb miv?

Tej zaum txawm ntawm cov dub rooks yog yug los kiag li dawb me nyuam qaib. Thiab txawm tias cov neeg (xws li dub) pom cov tib neeg uas heev dawb tawv nqaij, dawb zoo li cov plaub hau dawb thiab ib tug liab pliv-kob ob lub qhov muag. Qhov no tshwm sim yog hu ua albinism. Nyob rau hauv qhov tseeb, tsis yog ib qho albino dawb xim, thiab tsis thereof. Nyob rau hauv daim tawv nqaij, plaub hau thiab lub iris ntawm lub qhov muag muaj ib tug heev ncaav creatures melanin - ib yam khoom uas tiv thaiv lub cev los ntawm hnub ci tawg thiab coloring nws nyob rau hauv dub. Cov neeg sawv cev ntawm lub Negroid haiv neeg ntawm no enzyme yog ntau tshaj, lub sab qaum teb sab Europe haiv neeg - tsawg, thiab muaj kiag li tsis muaj albino. Cov yav tas muaj xws li thiab ib tug dawb miv.

Tab sis, yog hais tias nyob rau hauv cov qus, xws cov neeg feem ntau tuag thaum ntxov, tsis muab xeeb leej xeeb ntxwv, cov tsiaj muaj hmoo nyob rau hauv qhov kev txiav txim. Txawv txawv xim prized rau lub hnub ntawm ancient tim lyiv teb chaws, qhov chaw uas nws suav hais tias ib lub cim ntawm kev coj dawb huv thiab kev txhaum dabtsi. Cov neeg ua tib zoo cultivated ib tug twb hom noob ntawm albinism. Tam sim no cov dawb miv yog heev npaum li cas menyuam, thiab cov tsim cov qauv uas txiav tawm lub ib feem nyob rau hauv kev sib tw ntawm lub teeb beige, nyiaj thiab daj ntseg tus me nyuam muas lwj miv. Pub tsuas nyeem du daus dawb uas tsis muaj kev ntxoov, raws li zoo raws li multi-kob me ntsis. Cov xwb yog cov kittens, uas tej zaum yuav muaj me me me ntsis rau ntawm lub taub hau - nrog lub hnub nyoog, lawv yuav tsum ploj.

Tsiaj txhu nrog tooj liab los yog txiv kab ntxwv ob lub qhov muag (Tooj Eyed White), dua li cov daus xim, tsawg nws lag ntseg, tab sis cov dawb cov miv uas muaj ntau lub qhov muag (Khib Eyed Dawb, coj txawv txawv nyob rau hauv lub ob lub qhov muag), tej zaum yuav muaj ib tug me ntsis lub rooj sib hais qhov teeb meem. Nws tej zaum yuav lag ntseg, tiam sis

nyob rau hauv ib lub pob ntseg, los yog tsis hnov lus zoo. Nyob rau hauv txhua rooj plaub, tej nuj nqis cov ce xim ntawm cov mis nyuj los yog xiav ob lub qhov muag tseem tsis tau tseem qhia hais tias tus tsiaj - npub. Tab sis yog hais tias nws yog ntshai, thaum koj rov qab los thiab kov nws, ces muaj yog ua kev txhawj xeeb. Cov no zoo ntxim nyiam kawg cov tsiaj ib tug tshwj xeeb qhov chaw yog nyob los ntawm ib tug dawb cov miv uas muaj kob xiav qhov muag (Blue Eyed Dawb). Nws - tsis yog ib tug ua kom tiav albino: nws lub cev yog tam sim no nyob rau hauv ib tug me me npaum li cas ntawm melanin, uas xim rau sab khaubncaws sab nraud povtseg ntawm cov iris dub thiab lub tsis tuaj kawm ntawv ntawm no substance rau hauv lub Upper txheej tsim cov nyhuv ntawm blueness. Qhov tseem prized tsiaj nrog ib tug heev mob siab heev, xiav ob lub qhov muag. Tu siab, hais txog 20% ntawm lub pob zeb xiav Eyed Dawb yug lag ntseg. Lub luag hauj lwm rau nws thiab epistatic hom noob W, uas mus "txhais tes nyob rau hauv tes" nrog rau cov xilethi-aus xim.

Dawb miv yuav tsum tau tshwj xeeb yog ceev faj saib xyuas, txawm yog tias nws lub rooj sib hais lub zoo. Firstly, qhov no lub tsho tiv no yog heev yooj yim ntub. Secondly, rau ib tug dawb keeb kwm yav dhau yuav pom tshwj xeeb qias neeg pob ntseg thiab qhov muag soured. Peb, albinism noob thiaj ua rau cov tsiaj yog cov tsis tshua lam tau lam ua rau hnub ci tawg. Melanin tiv thaiv cov tawv nqaij thiab tsis tus miv muaj peev xwm tau txais ib tshav kub daim tawv, tab sis yog hais tias nws yuav tshwm sim feem ntau, thiab daim tawv nqaij cancer.