Isini esidityaniswa ngokwesondo
Isini esidityaniswa ngokubalaseleyo yindlela enqabileyo yokuba uphawu okanye ukuphazamiseka kungadluliselwa kwiintsapho. Uhlobo olunye olungaqhelekanga kwi-X chromosome lunokubangela isifo esihambelana nesondo.
Amagama ahambelana nezihloko zibandakanya:
- Autosomal ephezulu
- Ukuhlaziywa ngokuzenzekelayo
- Ichromosome
- Gene
- Ilifa kunye nezifo
- Ilifa
- Ukuxhamla ngesondo
Ilifa lesifo esithile, imeko, okanye uphawu luxhomekeke kuhlobo lwechromosome echaphazelekayo. Ingaba yi-chromosome ye-autosomal okanye i-chromosome yesondo. Kuyaxhomekeka ekubeni uphawu lubalulekile okanye luluhle kakhulu. Izifo ezinxulumene nezesondo zizalwa njengelinye lama chromosomes esini, angama X kunye nee Y chromosomes.
Ilifa elibalaseleyo lenzeka xa ufuzo olungaqhelekanga lomzali omnye kunokubangela isifo, nangona uhlobo olufanayo lomnye umzali luqhelekile. Imfuza engaqhelekanga ilawula isibini sofuzo.
Kwisifo esine-X esihambelana kakhulu: Ukuba utata uphethe uhlobo olungaqhelekanga lwe-X, zonke iintombi zakhe ziya kubudla ilifa esi sifo kwaye akukho namnye koonyana bakhe oya kuba nesi sifo. Kungenxa yokuba iintombi zihlala zilidla ilifa i-X chromosome yoyise. Ukuba umama uphethe uhlobo olungaqhelekanga lwe-X, isiqingatha sabo bonke abantwana babo (iintombi noonyana) baya kulidla ilifa eli sifo.
Umzekelo, ukuba kukho abantwana abane (amakhwenkwe amabini kunye namantombazana amabini) kwaye umama uchaphazelekile (une-X enye engaqhelekanga kwaye unesifo) kodwa utata akanalo uhlobo olungaqhelekanga lwe-X, amathuba alindelekileyo ngala:
- Abantwana ababini (intombazana enye nenkwenkwe enye) baya kuba nesi sifo
- Abantwana ababini (intombazana enye nenkwenkwe enye) abasayi kuba nesi sifo
Ukuba kukho abantwana abane (amakhwenkwe amabini namantombazana amabini) kwaye utata uyachaphazeleka (une-X enye engaqhelekanga kwaye unesifo) kodwa umama akakho, iimeko ezilindelekileyo zezi:
- Amantombazana amabini aya kuba nesi sifo
- Amakhwenkwe amabini akasayi kuba nesi sifo
Oku kungangqinelani akuthethi ukuba abantwana abazuza ilifa le-X engaqhelekanga baya kubonisa iimpawu ezinzima zesi sifo. Ithuba lelifa lintsha ngokukhulelwa ngakunye, ke ezi zinto zilindelweyo zisenokungabi yile nto yenzekayo kusapho. Ezinye iingxaki ezinxulumene ne-X zinzima kangangokuba amadoda ane-genetic disorder anokufa ngaphambi kokuzalwa. Ke ngoko, kunokubakho ukonyuka kwamanani okuphulukana nosapho okanye abantwana abambalwa abangamadoda kunokuba bekulindelwe.
Ilifa-ukoyama okunxulumene nesondo Imfuza-enxulumene nesondo iphambili; X-enxulumene enkulu; Y-enxibelelene kakhulu
- Imfuza
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