Uhlobo olusha lwe-twinning lwalutholwa ososayensi ngo-2007. Basebenzisa leli gama elithi Semi-Identical Twinning embikweni oshicilelwe kuyi- Journal of Human Genetics ngo-2007. Lolu cwaningo lwalusekelwe kusethi elingaziwa lawababa, elichazwe njengendawo ethile phakathi kokufana nokuhlangana (okubizwa nangokuthi i- monozygotic noma i- dizygotic ). Bazimisele ukuthi amawele ayefana nohlangothi lomama kodwa ahlanganyele ingxenye yesigamu sikayise.
Lawa mawele angabonakali atholakala ukuthi akhule lapho imbumbulu emibili ikhiqiza iqanda elilodwa, lenza i-triploid, ehlukana ngakho. Ngokuphambene, amafomu amafana afanayo (monozygotic) uma iqanda elilodwa elikhuliswe lihlukaniswa libe yizibili; amawele angamahloni (ama-dizygotic) amafomu amaqanda amabili ahlukene ahlonywe yi-sperm ezimbili ezahlukene. Kodwa-ke, kule nkinga ye-twinning efanayo, ama-sperm amabili azalisa iqanda elilodwa elihlukaniswa kabili. Ngokuzala, amawele anesifo esifanayo sama-genes, kodwa abelana kuphela ngamaphesenti ama-50% wezakhi zofuzo zabo, okufana namawele we-dizygotic noma abafowabo.
Imininingwane mayelana nobunikazi bamawele ayibonakalwanga, ngaphandle kokuthi bazalwa e-United States, mhlawumbe phakathi nawo-2000. Bakhulelwe ngaphandle kosizo lokuzala futhi bobabili amawele babonakala bevela ngokujwayelekile.
Abacwaningi baphawula ukuthi lolu hlobo lwejubane lwaluyinto engavamile kakhulu. Omunye uchwepheshe we-twinning uthe kwakungeke neze kwenzeke ukuthi elinye iqoqo lamawele afana namabili ayoke atholakale.
Kulesi simo, amawele afika kumcwaningi lapho i-Twin A iboniswa njenge-hermaphrodite yangempela enezakhi zobulili ezingenangqondo, enezicubu zomzimba ezine-ovarian kanye ne-testicular. I-hermaphrodite ichazwa njengomuntu lapho izitho zomzimba zesilisa nabesifazane zikhona emzimbeni. Noma kunjalo, i-Twin B iyinkosikazi yesintu.
Izimbangela Zaleluhlobo Lokwahlulela
Abacwaningi babengaqiniseki ukuthi yini eyabangela lolu hlobo lokugubula, njengokufana kwejubane le-monozygotic lihlala liyimfihlakalo. Enye imfundiso yaphakamisa ukuthi iqanda leqanda lihlukaniswe, kodwa ngaphambi kokuhlukanisa, iseli ngayinye lahlonywa yi-sperm ehlukile, idonsa izakhi zofuzo ngaphambi kokuhlukanisa ngokuphelele. Kungenzeka ukuthi, izinhlobo ezimbili zesisu zakhula iqanda elilodwa, uhlobo lokutshala kabili, nokuthi iqanda lihlukaniswa.
Isazi sezinto zezinto eziphilayo uMichael Golubovsky sichaza umqondo walolu hlobo lwe-twinning ngo-2002. Uphakamise ukuthi igama elithi sesquizygotic lingachaza amawele aphuma "ekubandakanyekeni kwama-pronunkhi amabili wesilisa ekukhulisweni kwemikhiqizo emibili ye-female meiotic," "okuphakathi okuyingqayizivele" phakathi kwamawele e-monozygotic ne-dizygotic.
Umthombo:
I-Golubovsky, M. "I-twinning yomndeni: i-hypothesis kanye nomthelela wezofuzo / wezokwelapha." Ucwaningo lwe-Twin: I-Official Journal ye-International Society of Twin Studies , ngo-Ephreli 2002, pg. 75.
Souter, VL, et al. "Icala le-hermaphroditism yeqiniso liveza indlela engavamile yokwahlupha." I- Human Genetics , ngo-Ephreli 2007, isb. 179.
Whitfield, uJohn. "Amawele angafani nawo atholakele" Uhlobo , Olutholakala NgoNovemba 29, 2015. http://www.nature.com/news/2007/070326/full/news070326-1.html