Chromosome Extra abantu. ukungaphili chromosomal

Umzimba womntu - yinkqubo entsonkothileyo yoyilo, noqhuba kumanqanaba ahlukeneyo. Ezithweni kunye neeseli banako ukusebenza ngexesha elifanelekileyo, kwiinkqubo ezithile zengqo- kufuneka sibandakanye izinto ezithile. Oku kufuna isiseko esiqinileyo, oko kukuthi, ukudluliselwa oluchanekileyo ikhowudi yezofuzo. Kuyinto genetic material azalwa olawula uphuhliso mbungu.

Nakuba kunjalo, utshintsho yemfuza maxa wambi kwenzeka ezivelayo imibutho ezinkulu okanye zinxulumene yemfuza ngamnye. iimpazamo enjalo ibizwa zofuzo ngezakhi. Kwezinye iimeko, le ngxaki zinxulumene iiyunithi noshowo iiseli, oko zofuzo yonke. Ngako oko, kulo mzekelo, impazamo kuthiwa chromosome wezakhi.

Iseli nganye zabantu ngokuqhelekileyo iqulethe inani elifanayo zofuzo. Ayavumelana yi zofuzo efanayo. Iseti epheleleyo ka-23 ama zofuzo, kodwa amaxesha ngaphantsi kwe-2 iiseli lwegciwane. Oku kungenxa yokuba ekukhulelweni ngxubevange isidoda neqanda iiseli kufuneka uyakubonisa ukudibana ngokupheleleyo zonke zofuzo eziyimfuneko. usasazo ayenzeki ngokwazo, yaye ukuze ngqo ezithile, kunye ngolandelelwano yomgama ifana nqwa nale abantu bonke.

izakhi Chromosomal igalelo utshintsho inani labo kunye nesakhiwo. Ngenxa yoko, kusenokubakho chromosome engaphezulu okanye, icala, ukuba uya kufunwa. Le kungalingani kungabangela isisu okanye igalelo inkangeleko ukuphazamiseka chromosomal.

Iintlobo zofuzo nabanezinto ezingaqhelekanga zabo

Chromosome - inaso imizila yemfuza kwiseli. Limela kabini kwemolekyuli iDNA nezintsonkothileyo histones. Ndiyila lwenzeka zofuzo prophase (ixesha hlula iseli). Nangona kunjalo, ngexesha metaphase kube lula ukufunda. Zofuzo iqanjwa chromatids emibini edityaniswe constriction zaseprayimari imi iseli ikhweyitha. constriction Primary iyahlula chromosome ngamayelenqe 2 ubude efanayo okanye ezahlukeneyo.

Ezi ndidi zilandelayo zofuzo:

• metacentric - ngeengalo anobude obulinganayo;
• submetacentric - ngeengalo enobude olungalinganiyo;
• acrocentric (intonga) - elinye elifutshane kunye nezinye amagxa elide.

Mgaqweni zinkulu kakhulu nezincinane. yenze uphando iyohluka, kuxhomekeke kwizicwangciso. Abanye ibhaqe ngemakroskopu akwenzeki. Kwiimeko ezinjalo, sebenzisa indlela umahluko amabala, kodwa kuphela xa isahlulo ochaphazelekayo ibalwa kwizigidi nucleotides. Kuphela ngokumisela ulandelelwano nucleotide bangabhaqa zofuzo ezincinane. A ukunyhashwa ezinkulu kungabangela isiphumo ngokukhawuleza emzimbeni womntu.

Xa lingekho elinye chromosome ukungaqheleki ebizwa monosomy. chromosome Extra emzimbeni - trisomy.

izifo chromosomal

Izifo Chromosomal - izifo yemfuza kwenzeka ngenxa chromosomal angahlangani. Baya kuvela ngenxa yotshintsho kwinani zofuzo okanye rearrangements enkulu

Xa iyeza ukuba usekude lee ukusuka kumphakamo wangoku zophuhliso, kwakukholelwa ukuba umntu zofuzo 48. Kwaba kuphela ngo-1956 bakwazi ukubala ngokuchanekileyo kubala uze uchonge ubudlelwane phakathi yokwaphuka inani zofuzo kunye nezinye izifo njengelifa.

3 iminyaka kamva, i-nzulu French J. Lejeune, kwafunyaniswa ukuba ukunyhashwa abantu lwengqondo ukuxhathisa wosuleleko enxulumene ngqo wezakhi lofuzo. Wayibhula into abeyibhikicile, chromosome extra-21. Ungomnye incinane, kodwa buzinze inani elikhulu yemfuza. chromosome Extra kwaqondakala-1 ngaphandle 1,000 kubelekwa. Esi sifo chromosomal yeyona kufundwa kakhulu neyaziwa Down syndrome.

Kwangokunjalo 1959 ke bafunda nezingqinekayo ukuba ubukho oyindoda extra X chromosome kukhokelela sisifo Klinefelter kaThixo apho umntu onesifo ukukhubazeka engqondweni zingachumi ngokwaneleyo.

Noko ke, nakubeni ukungaqheleki chromosomal kuvandlakanywa yaye kufundwa ukulungiselela ixesha elide, nokuba amayeza bale mihla nako ukunyanga izifo yemfuza. Kodwa kunokuba yala maxesha iindlela kokuxilongwa enjalo zofuzo.

Intsusa ye chromosome extra

Le anomaly isizathu kuphela ukuvela chromosome 47 endaweni Iingcali 46. entsimini yamayeza singqiniwe ukuba oyena nobangela an chromosome extra - ubudala umama okhulelwe. Okona abakhulelweyo, kokukhona ukuba nokwenzeka nondisjunction. Nje ngenxa yesi sizathu, abafazi bacetyiswa ukuba ukunika ekuzalweni ukuya kwiminyaka-35. Kwimeko ukukhulelwa emva kokuqala kwalo yobudala kufuneka umana.

Imiba ezinegalelo ukuvela kukho chromosome elongezelelweyo, kuquka inqanaba mgceni anda ehlabathini liphela, izinga ungcoliseko lokusingqongileyo, kunye nangaphezulu.

Ekukholelwa ukuba chromosome extra kwenzeka ukuba sasi kwisa- kwiimeko uhlobo efanayo. Yinto nje intsomi: uphando lubonise ukuba abazali abanabantwana sigula zizigulo chromosomal na karyotype uphilile.

Uxilongo lokuhambela umntwana angahlangani chromosomal

Ukunakanwa ukunyhashwa zofuzo, ekuthiwa simahla aneuploidy, ibonisa ukuswela mbungu okanye intshiyekela zofuzo. abafazi abakhulelweyo abadala ngaphezu kweminyaka 35 kufuneka bangenele inkqubo zokufumana isampulu fluid. Ukuba sifumanisa yaphula karyotype, umama okhulelweyo kuya kufuneka kupheliswe ukukhulelwa, njengoko wazalwa umntwana bonke ubomi ahlupheke sisifo esibi kungekho unyango olusebenzayo.

zofuzo Nokunyhashwa ngokubanzi i imvelaphi koomama, kodwa kufuneka uhlole ukuba iiseli foetal kuphela, kodwa izinto ezithi akhiwa ngexesha lokuvuthwa. Le nkqubo ibizwa ngokuba lokufunyaniswa ukuphazamiseka genetic komzimba polar.

Down engqondweni

Izazinzulu ezichazwe kuqala Mongolism yi Phantsi. chromosome Extra, zofuzo sifo phambi apho kulindeleke ukuba siphuhlise, uye wafundela ngokubanzi. Xa Mongolism kwenzeka kwi chromosome 21 trisomy. Oko kukuthi umntu ogulayo endaweni 46 ajike zofuzo 47. The main phawu - le ukuqhwalela kuphuhliso.

Abantwana kufuneka kukho chromosome elongezelelweyo emsebenzini, abaneengxaki kakhulu izinto kwizikolo zokufunda, ngoko ke kufuneka enye indlela yokufunda. Ukongeza kule yengqondo, kukho ukutenxa, kunye nophuhliso ngokwasemzimbeni, ezizezi: Amehlo ungasuki, ubuso tyaba, imilebe ebanzi, ulwimi iflethi, yayinqamlela okanye eyandisiweyo imilenze neenyawo, isihlwele esikhulu ulusu kwindawo entanyeni. okulindeleke kwi-avareji engama-50.

Patau syndrome

Kwakhona uthi trisomy Patau syndrome, apho kukho iikopi ezintathu chromosome 13. Uphawu lisahlulayo na ukuphazamiseka kwenkqubo luvo okanye baswele yayo. Izigulana waphawula malformations ezininzi, kubandakanywa ukuba izifo iziphene kwentliziyo. Ngaphezu kwama-90% yabantu kunye syndrome of Patau kufela kunyaka wabo wokuqala bezelwe.

Edwards syndrome

Le anomaly, ezifana engaphambili, ibhekisela trisomy. Kule meko sithetha malunga chromosome 18. Edwards syndrome luphawulwa zezigulo ezahlukeneyo. Ngokusisiseko, izigulane kubonisa deformation ithambo, kukutshintsha imilo lukakayi, iingxaki kunye nenkqubo bokuphefumla sentliziyo. kweminyaka yokuphila idla kweenyanga ezi-3, kodwa ezinye iintsana ukuphila ukuya kunyaka.

izifo Ezingokuqandusela abanala makhwiniba chromosomal

Ukongeza kwezi syndromes, abanala makhwiniba chromosomal, kukho abanye apho kukho kwakhona anomaly lwamanani beemeko. izifo ezifana ziquka:

1. Triploids - iseliswelekile chromosome disorder apho inani labo modal ngu 69. Pregnancy idla iphela kwesisu ekuqaleni, kodwa mntwana asinde akahlali kweenyanga ngaphezulu kwe-5, zininzi iziphene kwasekuzalweni.
2. Wolf-Hirschhorn syndrome - Kwakhona enye makhwiniba ezinqabileyo chromosomal, leyo iphuhlise ngenxa ngokucima isiphelo distal yengalo elifutshane chromosome. A ndawo imandla yale sifo 16.3 kwi chromosome 4p. Iimpawu zazo idla - iingxaki kuphuhliso, abazizidalwa ngokukhula, ukuxhuzula, kunye neempawu zobuso boqobo
3. Prader-yamgweba syndrome - isifo kunqabile kakhulu. Xa loo chromosome anomalous 7 genes okanye iinxalenye 15 chromosome zooyise ayisebenzi, okanye isusiwe. Tags: zokufota, strabismus, zila uphuhliso emzimbeni nasengqondweni, ukudinwa.

Indlela yokukhulisa umntwana kunye chromosomal disorder?

Ukukhulisa umntwana kunye nesifo chromosomal bekhubazekile akukho lula. Ukuze ukwenza ubomi bakho lula, imithetho ethile kufuneka ilandelwe. Okokuqala, kufuneka ngoko nangoko ukoyisa lithemba kunye noloyiko. Okwesibini, akuyomfuneko ukuchitha ixesha ukufuna ngumtyholwa, ukuba ayikho. Okwesithathu, kubalulekile ukuba isigqibo uhlobo uncedo olufunekayo umntwana kunye nosapho, uze emva koko ukuba bezifo zoncedo lwezonyango, ngokwengqondo zemfundo.

Kunyaka wabo wokuqala bezelwe uphethwe kubaluleke kakhulu, njengoko umsebenzi ngeemoto kuphuhliswa kweli xesha. Ngoncedo abaqeqeshelwe umntwana ngokukhawuleza bafumane izakhono motor. Kuyimfuneko ukuba ukuhlola cala usana kwi ngezifo emehlweni nokuva. Kwakhona, umntwana kufuneka kubonwe yi wabantwana, endocrinologist kunye neuropsychiatrist.

Bayakhuthazwa abazali ukuba ukungena umbutho ekhethekileyo ukuze bafumane iingcebiso ezichanekileyo angummangaliso asuka abantu abaye bayoyisa le meko kwaye ukulungele ukwabelana.

Media chromosome extra lobuhlobo ngokubanzi, eyenza kube lula ukuba ukukhulisa, yaye njengoko konke okusemandleni alo ukufumana imvume yabantu abadala. Inqanaba Uphuhliso umntwana eneemfuno ezizodwa ziya kuxhomekeka kuya kuba njani nzima ekufundiseni izakhono ezisisiseko. abantwana abagulayo, nangona ningatyhafi abanye, kodwa zifuna eninzi ingqalelo. Kuyimfuneko kusoloko ukukhuthaza ukuzimela womntwana. Self wasifundisa ukuba njani ngomzekelo, kwaye ngoko ke kuya ukulinda ixesha elide.

Abantwana abagula chromosomal afakwa iitalente ezizodwa livezwe. Isenokuba izifundo zomculo okanye umzobo. Kubalulekile ukuphuhlisa usana lwakho, ukudlala imidlalo esebenzayo kunye nezakhono motor asakhasayo, ukufunda, kwaye beqhelene ukuba urhulumente kunye nokuchaneka. Ukuba umntwana ukuvakalisa yonke uthando lwam, inkathalo, ingqalelo kunye nothando, uya kusabela ngayo uhlobo.

Ingaba lukhona unyango?

Ukuza kuthi ga ngoku, esi sifo asinyangeki chromosome; indlela nganye ecetywayo iyahlolwa, kodwa sele wabonakala ukusebenza kwazo lwezonyango na. Yenza inkqubela kuphuhliso elihle kwezentlalo kunye nokufunyanwa kwezakhono inceda uncedo lwezonyango kunye zemfundo ngendlela.

Umntwana egulayo kufuneka ngawo onke amaxesha ibonwe ziingcali njengeyeza weza kwinqanaba apho uyakwazi ukunika izixhobo eziyimfuneko kunye neendidi ezahlukeneyo unyango. Kwakhona ootitshala basebenzise iindlela zale mihla ekufundiseni kunye nokuvuselelwa umntwana.