Uhlobo olutsha lokwahlula lwafumaniswa ngabaososayensi ngo-2007 kwingxelo eshicilelwe kwi- Journal of Human Genetics ngo-2007. Olu phoso lusekwe kwisethi engaziwayo yamamawele, achazwa njengendawo ethile phakathi kokufanayo kunye nobudlelwane (owaziwa ngokuba yi- monozygotic okanye i- dizygotic ). Bazimisele ukuba amawele ayefana noluhlu lwabazali kodwa abelana ngesahlulo seengcambu zikayise.
La mawele angabonakaliyo akholelwa ukuba aye aphuhliswa xa iimbumba ezimbini zalisa iqanda elilodwa, lenza i-triploid, eyahlukana. Ngokwahlukileyo, ifom efana (i-monozygotic) ifom xa iqhekeza elilodwa lityalwe libe limbini; ifom (ama-dizygotic) amawele amafomu amaqanda amabini ahlukeneyo atyunjwa ngamabini amabini ahlukeneyo. Nangona kunjalo, kule nkcazo ye-twinning efanayo, i-sperm ezimbini zalisa iqanda elilodwa elihlukanisa kabini. Ukuzala, amawele anesifo esisodwa semvelo, kodwa wabelana kuphela malunga ne-50% yeengcambu zabo zohlobo, njengamawele e-dizygotic okanye abantakwabo.
Iinkcukacha malunga nolwazi lweamawele azibonakalwanga, ngaphandle kokuba zazalelwa eMelika, mhlawumbi phakathi ko-2000. Baye bazalwa ngaphandle koncediso lokuzala kwaye bobabini amawele abonakala beqhelo.
Abaphengululi bathi le mpahla yayiyiqabile kakhulu. Omnye uchwephethi wachaza wathi kwakungenakwenzeka ukuba enye idilesi yeewele ezifanayo ziza kufunyanwa.
Kule meko, amawele afika kwingqwalasela yomphandi xa i-Twin A yachongwa njenge-hermaphrodite yinyani kunye ne-genitalia engenangqondo, enezicubu zombini kunye ne-testicular. I-hermaphrodite ichazwa njengowomntu apho amalungu omzimba nabesetyhini abonakalayo emzimbeni. Nangona kunjalo, i-Twin B i-anatomically male.
Izizathu Zelolu hlobo lokucima
Abaphandi abazange baqiniseke ngokuqinisekileyo ukuba yintoni eyenza lolu hlobo lwejubane, njengokuba i-twinning ye-monozygotic ihlala ingummangaliso. Enye imfundiso yaphakanyiswa ukuba iqhekeza leqanda lihlukaniswe, kodwa ngaphambi kokuhlukanisa, iselinye ngasinye sahlanjululwa yi-sperm eyahlukeneyo, idibanisa iigeni phambi kokuhlukana ngokupheleleyo. Mhlawumbi, izilwanyana ezimbini ezahlukileyo zizalisa iqanda elilodwa, uhlobo lokuqhumisa kabini, kunye neqanda likwahlukana.
Isazi sezinto eziphilayo uMichael Golubovsky sachonga umxholo wolu hlobo lweewele kwi-2002 yophando. Wacetyisa ukuba igama elithi sesquizygotic lingachaza amawele ngenxa yokuthi "ukubandakanyeka kwamagama amabini emininzi ekukhulisweni kwemveliso emibili yezilwanyana," "ophakathi" phakathi kwama-monozygotic kunye namawele e-dizygotic.
Umthombo:
I-Golubovsky, M. "Ukwahlula kwintsapho: i-hypothesis kunye nempembelelo yemfuza / yezobuchopho." Uphando lwe-Twin: I-Official Journal ka-International Society of Twin Studies , ngo-Apreli 2002, iphe. 75.
Souter, VL, et al. "Inyaniso ye-hermaphroditism ibonisa indlela engavamile yokwahlula." I- Human Genetics , ngo-Epreli 2007, iphe. 179.
Whitfield, John. "Amawele athile angafaniyo afunyenwe" Uhlobo , lufikeleleke ngoNovemba 29, 2015. http://www.nature.com/news/2007/070326/full/news070326-1.html