I-Concept of Generational Twinning
Inkolelo evamile mayelana namawele kanye nokuphindaphindiwe ukuthi lawo mawele awela isizukulwane. Abanye abantu bacabanga ukuthi akunakwenzeka ukuthi amawele azoba namawele, kodwa angase abe namadodakazi amabili. Ingabe ikhona isisekelo sesayensi sale nkolelo?
Ingabe Ukuqothula Kulifa?
Lesi sitatimende sisekelwe ekucatshangweni ukuthi ukuguqulwa kwezakhi zofuzo kuyimvelo futhi kugijima emindenini.
Kodwa-ke, uma lokho kwakuyiqiniso ngempela-uma kwakukhona ifulegi lamawele - amawele azokwenzeka ngezikhathi ezibikezelayo kulawo mindeni ethwala isakhi. Kodwa-ke, kunemiphumela embalwa emindenini enezinwele kuzo zonke izizukulwane zabo. Izikhala kungenzeka ukuthi kungani ezinye ziphakamisa "ukweqa isiko".
Amanye ama-twinning angabhekwa njengezakhi zofuzo. Ngenkathi engekho i-gene yesine, kukhona isakhi sofuzo esenza abanye besifazane bavelele ekukhuliseni amawele. Ukwehla komzimba, ukuthambekela kowesifazane ukukhulula amaqanda angaphezu kweyodwa esikhathini sokuya esikhathini, kungase kube nomthelela ekuphatheni izakhi zofuzo. Uma amaqanda amabili noma ngaphezulu ekhulelwa, i-twistning dizygotic (fraternal) ingenzeka. Noma kunjalo, amawele e-monozygotic (afanayo) acatshangwa ukuthi ahleliwe; akukho okuyingxenye yezofuzo okuye kwatholakala ukuthi kwandisa ukufana okufana okufanayo .
I-Genetics of Hyperovulation
Kuze kube manje, izifundo zezakhi zofuzo ezithile ziye zabonisa imiphumela ephikisanayo ngokuthi ngabe ibangele ukukhukhumeza noma ikhulise amathuba okuba namawele asondelene.
Noma yikuphi ukuxoxisana ngesakhi sofuzo esibangelwa ukuxoshwa kwemvelo kuyindlela kuphela. Ngalolo cala, bheka ukuthi izakhi zofuzo zizodlala kanjani.
Uma imbangela yokugubula ihlotshaniswa nokukhulelwa komzimba, i-genetics yomama kuphela izothonya amathuba okuba namawele . Indima kababa ayiyona into esizukulwaneni samanje.
Uma izihlobo ziphawula ukuthi "amawele agijima ohlangothini lwenyoko," owesifazane angase abe namathuba amawele, kepha hhayi uma "amawele egijima ohlangothini lukababa." Lokhu kuyiqiniso kuphela kuleso sizukulwane, njengoba izakhi zofuzo zikababa ziyokwenza ithonya lamathuba enzalo yakhe enezinwele.
Uma isakhi sofuzo sasiyinhloko, owesifazane wayezodinga kuphela ukuba nomzali oyedwa adlulisele igesi ukuze ahlasele. Izinto ziyinkimbinkimbi uma isakhi sofuzo siphezulu futhi owesifazane kufanele adinga amakhophi wegesi kubazali bobabili ukuze abonise.
Amawele aphehla isizukulwane
Izingane zithola izakhi zofuzo ezivela kubazali bobabili, futhi igciwane lesiganga lokuxoshwa komzimba lingase lidluliswe ngumama noma ubaba. Ngenkathi umama eveza isisindo nge hyperovulating, ubaba wayezoba yithwala yangasese yezakhi.
Indodakazi yombhangqwana lapho ubaba noma umama ethwala izakhi zofuzo zengozi kungase ibe namathuba amaningi okuba namawele. Indodana yalowo mbhangqwana ayengafuni, nakuba kungenzeka ukuthi uyithwala wezakhi zofuzo kanye nendodakazi yakhe kungenzeka ibe namathuba amawele. Uma lesi sakhi sasikhona futhi lo mbhangqwana ungenawo indodakazi, amadodana abo angeke abe namawele, kepha abazukulu bawo bebengaba, futhi lo mkhuba wawuyokweqa isizukulwane.
Isibonelo
Ake sibone isibonelo somndeni ukuze siqonde lokhu. Kulesi sibonelo, isakhi sinamandla futhi siboniswa ngabesifazane ngisho noma sizuze njengefa lomzali oyedwa.
- Isizukulwane sokuqala (amawele): u-Adamu no-Eva. Ake sicabange ukuthi u-Eva unesisindo se-hyperovulation. Banezingane eziyisithupha. Ababili babo bangamawele womfana, uJese noJakobe.
- Isizukulwane sesibili (Akukho amawele): UJese noJakobe bakhula. Zonke zikhiqiza izingane ezintathu, kodwa azikho amawele. Nakuba bephethe isakhi se-hyperovulation, abavuni. Ngakho-ke azikhombisi ukuthi kungenzeka ukuthi abalingani babo bazokhulelwa amawele.
- Isizukulwane sesithathu (amawele): abantwana bakaJese; Izingane zikaJakobe. Laba bazukulu baka-Adamu no-Eva. Indodakazi endala kaJese, mambize ngokuthi uMadonna, ubeletha amawele amantombazane, uThelma noLouise. Indodakazi encane kaJakobe, uBeyonce, ibeletha amawele amantombazane / izintombi, uLuka noLeia. U-Jesse noJakobe kungenzeka ukuthi badlulisela amadodakazi abo igciwane lesandulela ngculaza.
- Isizukulwane sesine (?): Ucabanga ukuthi kuzokwenzekani? Inzalo yabesifazane ingaba namawele. Noma kungenzeka. Inzalo yesilisa ayinalo iqhaza emazwini amawele azokhiqiza umlingani wabo. Kodwa bangase babe namawele noma bathelele ngezizathu ezihlukahlukene, futhi bangathuthulisa ngesineke igciwane lesifo sofuba ezizukulwaneni ezizayo.
Kule sibonelo, ungabona ukuthi kungani kuzovela ukuthi amawele awela isizukulwane. Kodwa akuyona umthetho onzima futhi osheshayo. Ngezinye izici eziningi ezinikeza ekukhanyeni , i-genetic hyperovulation gene iyoba yinto eyodwa ebangela inqubo.
Izwi elivela ku-Verywell
Kuze kutholakale isakhi sofuzo se-twinning, le ngxoxo imane nje isenzo sokuzijabulisa ekuqondeni izakhi zofuzo. Njengoba imibhangqwana ephindaphindiwe isebenzisa izidakamizwa zokukhiqiza ezisiziwe kanye nobuchwepheshe, isihloko siba namafu kakhulu. Ungase ube nombango onzima lapho uxoxa ngalokhu emndenini njengendlela yokwelapha kungenzeka ukuthi wadlala indima ekukhuliseni kanye nokuzalwa kwamawele.
> Umthombo:
> Ingabe Amathuba Okuba Namadodakazi Okunqunywa NgamaGenetics? I-Reference Reference Home, i-US National Library of Medicine. https://ghr.nlm.nih.gov/primer/traits/twins.