Umbuzo. : "Ngaba ikhona na isizathu sokuba amawele ahlanganiswe? Ingaba kukho na indlela yokukhusela ngaphambi kokuzalwa?"
Impendulo: Impendulo emfutshane kulo mbuzo ngu "Hayi" Ayikho indlela eyaziwayo yokukhusela idijithi. Kodwa ukuze kulungiswe ngokupheleleyo umbandela wokuthintela i-twinning, kubalulekile ukuqonda okungakumbi malunga namawele adibeneyo. Lo ngumbuzo onzima ukuphendula ngaphandle kokuqala ukujonga indlela kwaye kutheni amawele afana nawo.
Yintoni ehlanganiswa ngamabhinqa?
Amawele ahlangene ahlobo lwee- monozygotic twins. Oko kukuthi, zivela njenge-zygote enye ehlula zibe zibini. (I-zygote yintsuba ekhulelweyo.) Ngomnye umva emva kokukhulelwa, njengoko i-zygote ihamba ukuya kwisibeleko sokufakelwa, iiseli ziyahlula kwaye zidibanise. Kwaye kwimeko yamawele e-monozygotic, iiseli zahlula kwaye zenze ezimbini njenge-blastocysts, ezenza amawele. Oku kwahlukana kunokuthi kwenzeke kwiintsuku ezimbalwa, kodwa kwezinye iimeko, lilibazisekile kwaye alihluli kwiintsuku ezili-12 okanye ngaphezulu. Ngelo xesha amafayili adibeneyo, amawele aphuhlisayo esibelethweni ngoxhumano lomzimba. Njengoko igama lisikisela, ngaba ngokwenene abantu ababini bahlanganisana. Bangabelana ngesikhumba kunye nezicubu, okanye bangahlakulela kunye nezitho kunye nezitho ezabelwana ngazo. Amawele adibeneyo awanqabile, avela ku-1 kuphela kuma-200,000 azalwa ngokuzalwa.
Izizathu zeMonozygotic Twinning
Ayaziwa ukuba yintoni eyenza i-twinning monozygotic , kwaye ngokunjalo, akukho mntu uqinisekileyo ukuba yintoni ebangela ukuba i-twinning idibene.
Nangona kukho iingcamango ukuchaza indlela amawele adibana ngayo, kukho ukungaqiniseki okukhulu malunga nesizathu esona. Akukho sizathu esichazwe ngokucacileyo sokuba uchaze ukuba kutheni ukwahlukana kwamaqanda athile, aphuhlise abe ngabantu ababini. Akunakho na inkcazo malunga nokuba kutheni ukwahlukana kungaphumeleli okanye kungaphelelanga, kubangele amawele adibeneyo.
Ukudibanisa i-twinning ayikwazi ukubizwa ngokuba yi-genetics, ukuziphatha komama, ukunyamezela, intsholongwane, ukugula, imiba engqongileyo okanye nayiphi na into eyaziwayo ngeli xesha.
Ekubeni engaziwa yintoni ebangela imeko evelisa amawele ahlangeneyo, akukho ndlela eyaziwayo yokukhusela ukuba kwenzeke. I-twinning ye-Monozygotic-kunye ne-twinning-ehlangene-isala iyingcamango engachazwanga.
> Imithombo:
Spencher, R. "Imbryology yeengcali kunye nokuhlalutya kwamawele ahlangeneyo: inxenye ye: embryogenesis." I-Clinical Anatomy , Vol. 13, Issue 1, 2000, iphe. 36-53.
IQuigley, C. Amabhinqa ahlangeneyo: Imbali, i-Biological and Ethics Issues Encyclopedia, McFarland & Inkampani (2003).
Amaqiniso ngamawele adibeneyo. IYunivesithi yaseMary University. http://umm.edu/programs/conjoined-twins/facts-about-twins.