Ngokumalunga namawele, i-zygosity yinto ebalulekileyo yokuqonda. Kwaba nabazali bamawele kunye namawele bahlala bedidekile malunga ne-zygosity, kunye nendlela esetyenziswa ngayo ukuhlukanisa amawele. Funda ukuze ufumane inkcazo ye-zygosity.
Inkcazo yeZygosity
Iimpawu ze-zygote (iseli elenziwe yimanyano yeigetes ezimbini). Ubuqhetseba kusetyenziswa ukubonakalisa ulwalamano lwezofuzo phakathi kwenzalo yokuzalwa omnye, ngamawele okanye ngokuphindaphindiweyo.
Okubalulekileyo, i-zygosity ichaza i-twintype ngokusekelwe kwimvelaphi.
Ukunyuka kweeNinzi
Ubungqina bombandela obalulekileyo wengxoxo kwingingqi yephindaphindiweyo. Ukwahlula okuqhelekileyo kwe-twintype kufana kunye kunye kunye, okuqhelekileyo kusetyenziswa ukuchaza amawele ngokusekelwe kubukeka. Nangona kunjalo, i-zygosity ibaluleke kakhulu kwisigaba sesayensi ekuchazeni amawele ngokusekelwe kwindlela abayilwe ngayo.
Amawele e- Monozygotic okanye ifomati xa iqhekeza elilodwa lizaliswe (zygote) lidibanisa, okubangele ukuphuhliswa kweembumba ezimbini okanye ngaphezulu. Ngenxa yokuba zivela kwisethi enye yeeseli, abo bantu bane-DNA efanayo kwaye kaninzi banokubonakala okubonakalayo okubonakalayo.
I-Dizygotic - okanye i-multizygotic-i-multiples ziyizinto ezizodwa eziza kwenzeka xa amaqanda amaninzi ekhutshwe kwaye aphuhlise. Ifa labo lemfuyo lifana naliphi na abantakwabo, malunga ne-50% yeDNA yabo efanayo. Bangabonakala ngokufanayo ngendlela abazalwana abathandana ngayo.
Okanye, babonakala behluke ngokupheleleyo. Ziyaziwa ngokuba ngamawele okanye ama-multiples. Igama elithi trizygotic lingasetyenziselwa ukuchaza ezintathu.
Ubugwenxa bungaba nefuthe kwi-twin okanye ukukhulelwa okuphindaphindiweyo, umzekelo, kwiimeko zonyango ezinjengeTwin-to-Twin Transfusion Syndrome (TTTS).
Okanye, ukuseka i-zygosity kunokubonelela ngokucacileyo kwisigqibo sezocwangciso zezonyango, njengokuba kwenzeka kwilungu okanye ukufakelwa kwezicubu. Nangona kunjalo, akunakuhlala kuqinisekiswa ngokuqinisekileyo ngaphandle kokuhlaziywa kwe-DNA. Abazali abaninzi abaxeliwe malunga nobuqhetseba beziphindaphinda zabo, mhlawumbi ngenxa yokuba abaqondi kakuhle loo nto okanye ngenxa yokuba umnakekeli wezonyango wenza into engafanelekanga. Abazali banokufuna ukucacisa ukunyaniseka kwabo ngokuphindaphindiweyo ukuze banelise inzululwazi okanye babe nempendulo ekulungeleyo malunga nemibuzo ephindaphindiweyo malunga ne-twintype. Nangona i-zygosity ingahlawulwa ngezinye iimeko kwiimeko, ngokubanzi ukuhlalutya kwe-DNA yindlela kuphela yokukwazi ngokuqinisekileyo ukuba ingaba amawele angama-monozygotic okanye i-dizygotic.