Izifo Ukubambezeleka - nezimbangela zabo

izifo Ukubambezeleka - lawa izifo ayihambi ngokusebenzisa amangqamuzana lwegciwane ezizukulwaneni ngezizukulwane. Sekukonke kunezinhlobo ezingaphezu kuka anamathandathu amawaka izifo yalolu hlobo. Cishe abantu abangaba yizinkulungwane wabo zitholakala ngisho phambi kokuzalwa kwengane. Futhi, lezi zifo zingavela ekupheleni eshumini lesibili leminyaka yokuphila, futhi ngisho nangemva kweminyaka engu-40. Isizathu esikhulu izifo lezinceku kukhona izakhi zofuzo noma ukuguquka kwezakhi zofuzo zofuzo.

Ukwahlukaniswa izifo lezinceku

nezifo ngenxa yezakhi zofuzo zihlukaniswe amaqembu amabili:

1. Odnoprichinnye noma monofaktornye. Lawa izifo ezihlobene ukuguquka kwezakhi zofuzo kuma-chromosome noma izakhi zofuzo.
2. Pluricausal noma multifactorial. Lezi izifo zibangelwa izinguquko ezakhini zofuzo ahlukene kwabantu nomthelela wendawo ezungezile ngenxa imvelo sangaphandle izici eziningi.

Ukuze ukuvela isifo esifanayo e othile amalungu omndeni, umuntu kufanele abe ngendlela efanayo noma inhlanganisela efanayo zezakhi zofuzo, okuyinto vele nge yakhe oyisihlobo. Yingakho esiwufuzo exhumene khona zezakhi zofuzo ezivamile ngokwamazinga ehlukene eyisihlobo ziyezwana.

I degree of ubuhlobo futhi ingxenye zezakhi zofuzo Imininingwane ezihlobene

Kusukela lokuqala degree ziyezwana isihlobo nesineke ngamunye has 50% izakhi zayo zofuzo ezingafika, ngakho laba bantu kungenzeka ube inhlanganisela ezifanayo zezakhi zofuzo ungalokothi uphuze ukuze ukubukeka kwalesi sifo. Izihlobo we lesithathu nelesibili degree izihlobo mancane amathuba okuthi iziguli eziningi isethi efanayo zofuzo.

izifo Ukubambezeleka - izinhlobo

esiwufuzo kungenzeka ezingaphezu kweyodwa hlobo. ukuhlukanisa:

• izifo Chromosomal. Ngokuvamile, lapho cell division kwenzeka yokuthi ngazimbili ngabanye wama-chromosomes ukuhlala ndawonye. Ngenxa yalokho, entsha inombolo cell chromosome okungaphezu kwanoma yikuphi okukhona nezinye. Leli qiniso kuholela iziyaluyalu umzimba. Lezi zifo zenzeka 1 aphume 180 izinsana. Ngenxa yalezi izingane kunemidlalo eminingi kwasekuzalweni, retardation engqondo nokunye.
• Ukukhubazeka ku autosomes kuholela izifo eziningi futhi sina.
• Zofuzo. izifo Monogenic kuhilelani ukuguquka kwezakhi zofuzo e isakhi esisodwa. Lezi zifo zizuzwe esekelwe umthetho Mendel.
• izifo Ukubambezeleka umzimba. Cishe wonke angahlangani zofuzo elihlobene ne izifo umzimba ngofuzo. Lapho ukuguquka kwezakhi zofuzo e isakhiwo operon wamaprotheni zamagama kwenzeka nge isakhiwo okungajwayelekile. Ngenxa yalokho, imikhiqizo normal umzimba buthelela, okuyinto eyingozi kakhulu ebuchosheni.

Zikhona nezinye izifo sitholwa njengefa. Ngaphambi kokuqhubeka imithi yabo, Uzodlula ukuxilongwa ngokuphelele. Odokotela batusa ukuba anake kakhulu kubo bonke omama abakhulelwe emkhayeni lapho kuneziguli nale uphethwe. Lokhu kungenxa yokuthi abesifazane abanjalo kufanele kube ngaphansi kweso ekhethekile. Kuphela kulesi simo degree of ukubonakaliswa sifo ingane kungenziwa lincane. Into esemqoka ukukhumbula ukuthi iyiphi esiwufuzo, lapho kokungenela yezokwelapha nganoma kwenkathi ethile emihle yesikhathi kungaba ageleze kalula.