Ngokuphathelene namawele, ukuzonda kuyimbono ebalulekile ukuyiqonda. Ngisho nabazali bamawele namawele ngokwawo bavame ukudideka mayelana ne-zygosity, nokuthi isetshenziselwa kanjani ukuhlukanisa amawele. Funda ukuze uthole incazelo ye-zygosity.
Incazelo ye-Zygosity
Izici ze-zygote (iseli esakhiwe yinhlangano yamagetti amabili). Ukwesaba kusetshenziselwa ukuveza ubuhlobo bokuzalwa phakathi kwezalo lokuzalwa okulodwa, lawo amawele noma ama-multiples.
Ngokuyinhloko, i-zygosity ichaza i-twintype ngokusekelwe emvelaphi.
Ukwesaba kwama-Multiples
Ukwesaba kuyinkinga ebalulekile yengxoxo emphakathini we-multiples. Ukuhlukaniswa okujwayelekile kwawe-twintype kufana nokuhlangana, okuvame ukusetshenziselwa ukuchaza amawele ngokususelwa ekubukeni. Kodwa-ke, i-zygosity isigaba esibaluleke kakhulu sesayensi sokuchaza amawele ngokusekelwe kwendlela abakha ngayo.
Amawele e- Monozygotic noma ifomu lokuphindaphinda lapho iqanda elilodwa elikhulelwe (zygote) lihlukaniswa, okuholela ekuthuthukiseni imibungu emibili noma ngaphezulu. Ngenxa yokuthi zivela esitokisini samaseli afanayo, laba bantu bane-DNA efanayo futhi ngokuvamile babe nokubonakala okubonakalayo okubonakalayo ngokomzimba.
I-Dizygotic - noma i-multizygotic - i-multiples yizinto eziyingqayizivele ezenzekayo uma amaqanda amaningi ekhulelwa futhi ekhula. Ifa lazo zofuzo lifana nanoma yikuphi abantakwethu, abane-50% ye-DNA yabo efanayo. Bangase babheke ngendlela efanayo ukuthi izingane zakubo zithandana.
Noma, bangase babonakale behluke ngokuphelele. Zivame ukubizwa ngokuthi amawele okuzalwa noma ama-multiples. Igama elithi trizygotic lingasetshenziselwa ukuchaza izintathu.
Ukwesaba kungase kube nomthelela ekukhupheni okubili noma okuphindaphindiwe, isibonelo, ezimweni zezinkinga zezokwelapha ezifana ne-Twin-to-Twin Transfusion Syndrome (TTTS).
Noma, ukusungula i-zygosity kunganikeza ukucaca okucacile ezinqumweni zezokwelapha eziphindaphindiwe, njengokungathi kwenzeka isilwane noma ukufakelwa kwezicubu. Noma kunjalo, akukwazi njalo ukuqinisekiswa ngokucacile ngaphandle kokuhlaziywa kwe-DNA. Abazali abaningi baziswa kabi ngokungahambi kahle kwezimpande zabo, kungenxa yokuthi abaqondi kahle umqondo noma ngoba umnakekeli wezokwelapha wenza ukucabanga okungalungile. Abazali bangase bafune ukunquma ukungena kwabo kokuphindaphindiwe ukuze bawanelise ilukuluku noma babe nempendulo ekulungele imibuzo ephathelene ne-twintype. Ngenkathi i-zygosity ingase isetshenziswe ngezinye izikhathi ngokusekelwe ezimweni, ngokuvamile ukuhlaziywa kwe-DNA yindlela kuphela yokukwazi ngokuqinisekile ukuthi amawele angama-monozygotic noma ama-dizygotic.