Umzekeliso weTwin Zygosity

Amawele ahamba ngeendlela ezimbini ezahlukeneyo

Ukuhlaziya kwenzeka ngeendlela ezimbini ezahlukeneyo. Ukuhlukanisa amawele, i- zygosity ibalulekileyo kwikota. I-Zygosity inquma ukuba amawele afana (monozygotic) okanye u-fraternal (i-dizygotic okanye i-multizygotic). Yisisitshixo sokuqonda ukuba amawele afom. Kodwa ngamanye amaxesha ukubonakala kuyasebenza ngakumbi kunokuba kubhalwe phantsi.

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Ukubonakalisa iTwin Zygosity

Lo mzekeliso ubonisa ukubunjwa kwamawele afanayo kunye namaqabane. Kukunceda ukubonisa ukucatshulwa ngokubhekiselele kwenkqubo apho zombini iintlobo zamawele.

Izinto ezibalulekileyo ziquka iqanda elingenalusizo kunye nesidoda. Xa isidoda isondeza iqanda, yilapho i-zygote okanye iqanda elikhulelweyo. Ama-chromosomes avela kwi-nucleus yeqanda kunye nesidoda yakha i-nucleus entsha, ekwakheni i-zygote entsha.

I-zygote iphinda ihlalwe isahlulo seseli ukwenza ibhola yeeseli. Yifaka eludongeni lwesisu, eyenza i-placenta kunye ne-chorion ukuba yondliwe ngethuba lokukhulelwa.

Icala lasekhohlo lo mzekeliso libonisa amawele e-monozygotic , ayenzela i-zygote (iqanda elichumisiweyo) ukusuka kwelinye iqanda kunye nesidoda esisodwa. I-zygote kamva iyahlukana ukuze ivelise amawele amabini kunye nokwenza okufanayo.

Icala lasekunene lo mzekeliso libonisa ukuwahluza kwe-dizygotic , apho iifama ezimbini zizaliswa ngedoda kunye ne-zygotes ezimbini zenziwa, ngalinye likhula libe ngamawele. Ukususela ekuqaleni, ngamnye unemveliso yakhe yemfuza, efana neyiphi na ibini yabantwana abavela kubazali abafanayo.

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I-Monozygotic (eqhelekileyo) Ukucubungula

Ifom ye-monozygotic ifomu ukusuka kwelinye iqanda elityalwe. Kulo mfa nekiso, ungabona i-zygote enye idalwe iqanda elinye kunye nesidoda esisodwa. Ikwahlula zibe ziincinci ezibini ezilinganayo, kunye neefom ezimbini ezibini.

Igama lizichaza: i-mono (enye), i-zygote (iqanda elikhulelweyo).

Ngenxa yokuba zivela kudibaniso olufanayo lwesidoda kunye neqanda, ngoko ke ziqala ngokufakela imfuyo efanayo, zivame ukubonakala ngokufanayo kwaye zinokubonakala zifana ngokufanayo. Ngaloo ndlela, baziwa ngokuba ngamawele afanayo.

Amawele e-Monozygotic ahlala efana nesini (kunye neengqayizivele kakhulu ). Phantse enye yesithathu yamawele onke i-monozygotic. Akukho mntu uyazi oko kubangela ukuba iqanda lihlulwe emva kokukhulelwa, ngoko ke imvelaphi yewele le-monozygotic ihlala iyimfihlakalo.

Qaphela ukuba lo mzekeliso ubonisa amawele angama-monozygotic kwi-chorion ekwabiwe, kunye nepentecenta enye. Le meko ichazwa njengamawele e- monochorionic . Nangona kunjalo, akubona onke amawele e-monozygotic akha ngale ndlela. Ezinye iimbono ze-monozygotic zikhula kwizikhwama ezahlukileyo kunye namapentecenta amabini .

Oku kungabonakalisa indlela yokuqala i-zygote eyahlula ngayo ukwenza amawele. Ukuqhawula iintsuku ezintathu zokuqala kunokubangela ukuba iwele ngalinye libe ne-sac kunye ne-placenta. Ukutshiza emva kweso sizathu kubangela ukwabelana nge-placenta.

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I-Dizygotic (i-Fraternal) I-Twinning

Kulo mzekeliso, ubona umboniso we-twinning dizygotic . Oku kwaziwa ngokuba yijubane lobuzalwana. Amaqanda amabini ahlonywa ngamabini amabini ahlukeneyo. Izibini ezimbini zivelisa ama-embryos amabini okubangelwa iintsana ezimbini.

Igama livela kwi-di di (ezimbini) kunye ne-zygote (iqanda elichumisiweyo.) Inkqubo yaziwa nangokuthi i-twinning multizygotic, xa ivelisa i-multiples order multiples, ezifana ne-triplets okanye i-quadruplets.

Amawele e-Dizygotic ahluke kwiimbono ze-monozygotic kuba zivela kwi-zygotes ezihluke ngokupheleleyo. Imvelaphi yabo yemfuza iyafana nantoni nabantakwabo ababini. Bahlakulela kwiipakethi ezihlukeneyo, ngamaplacenta ahlukeneyo.

Uninzi lweamawele, malunga neyesibini-ntathu, luyi-dizygotic. Baya kuba ngamantombazana amabini, amakhwenkwe amabini, okanye omnye ngamnye.