Chromosome eyengeziwe abantu. kwezinso chromosomal

Umzimba womuntu - kuyinto kwakha isimiso esiyinkimbinkimbi multidimensional, nesebenzela emazingeni ehlukene. Ukuze kwezitho amaseli ungasebenza esifanele, izinqubo ezithile kwamakhemikhali kumelwe luhlanganise izinto ezithile. Lokhu kudinga isisekelo esiqinile, okungukuthi, ukudluliswa efanele isimiso sezakhi zofuzo. Kuyinto esingokwemvelo nesidoda okunikelwe elawula ukuthuthukiswa umbungu.

Nokho, zofuzo izinguquko ulwazi ngezinye izikhathi zenzeka lapho avele izinhlangano ezinkulu noma ezihlobene izakhi zofuzo zomuntu ngamunye. amaphutha maKristu abizwa ukuguquka kwezakhi zofuzo zofuzo. Kwezinye izimo, le nkinga ihlobene amayunithi isakhi amaseli, okungukuthi Ama-chromosomes e lonke. Ngakho, kulesi simo, iphutha ibizwa ngokuthi i-chromosome wezakhi.

Iseli elinye nelinye Lomuntu ngokuvamile iqukethe inani elifanayo chromosome. Ayavumelana by izakhi zofuzo ezifanayo. I isethi ephelele 23 ngazimbili wama-chromosomes, kodwa izikhathi esingaphansi 2 kumaseli lwegciwane. Lokhu kungenxa yokuthi ngesikhathi sokukhulelwa Fusion isidoda neqanda amaseli kufanele bamele inhlanganisela ezigcwele zonke izakhi zofuzo kunesidingo. ukusatshalaliswa yabo ingekho nemiyalezo, futhi ukuze ngokuqinile ezithile, nge ukulandelana komugqa ncamashi ngoba bonke abantu okufanayo.

ukuguqulwa kwezakhi zofuzo Chromosomal neqhaza ushintsho inombolo yabo kanye nesakhiwo. Ngakho, kungase kube chromosome eyengeziwe noma, Ngakolunye uhlangothi, ngeke ezingabanjwanga. Lokhu kungalingani kungase kubangele isisu noma neqhaza ukubukeka chromosomal iziyaluyalu.

Izinhlobo wama-chromosomes futhi kwezinso zabo

Chromosome - othwala ukwaziswa kwezakhi zofuzo engqamuzaneni. Limelela kabili i-molecule ye-DNA eziyinkimbinkimbi nge histones. Owenza yenzeka prophase Ama-chromosomes e (i-cell division isikhathi). Nokho, ngesikhathi metaphase lula ukufunda. Ngokuvamile ama-chromosome yakhiwa chromatids ezimbili ixhunyiwe constriction eyinhloko sise yenkabazwe cell. constriction Primary uhlukanisa chromosome 2 iziza ubude efanayo noma ehlukile.

Lezi zinhlobo ezilandelayo Ama-chromosomes e:

• metacentric - ne izingalo ubude alinganayo;
• submetacentric - ne izingalo engalingani;
• acrocentric (induku) - umuntu iDemo kanye nezinye emahlombe eside.

Anomalies okulula ezinkulu nezincane. izindlela Ucwaningo iyashiyana ngesikhathi kulungiselelwa. Ezinye Kutholakale ngesibonakhulu akunakwenzeka. Ezimweni ezinjalo, sebenzisa indlela umehluko staining, kodwa kuphela lapho ingxenye abathintekayo ibalwa izigidi ama-nucleotide. Kuphela ngokusungula ukulandelana nucleotide kungathola ukuguquka kwezakhi zofuzo encane. A ukwephulwa emikhulu kuholele umphumela evelele emzimbeni womuntu.

Esikhathini engekho omunye chromosome angahlangani ngokuthi monosomy. chromosome eyengeziwe umzimba - trisomy.

izifo chromosomal

izifo Chromosomal - nezifo ngenxa yezakhi zofuzo ukuthi zenzeka ngenxa chromosomal okungavamile. Kuphakama ngenxa yezinguquko inani lezakhi zofuzo noma rearrangements enkulu

Lapho imithi wayesekhona kude ezingeni lamanje ukuthuthukiswa, kukholakala ukuthi umuntu inama-chromosome angu-48. Kwakungenxa nje ngo-1956 yakwazi kahle ukubala Bala futhi ukuhlonza ubuhlobo phakathi ukuphula isivumelwano inani lezakhi zofuzo futhi abanye izifo sitholwa njengefa.

iminyaka engu-3 kamuva, usosayensi French J. Lejeune, kwatholakala ukuthi ukuhlukumeza zabantwana kwengqondo kanye ukumelana Lesifo kuhlobane ngokuqondile kuguquka ocwaningweni. Kwakungenxa-chromosome eyengeziwe 21. Ungomunye owesincane, kodwa bagxila inqwaba izakhi zofuzo. chromosome eyengeziwe laligujwa e 1 aphume 1,000 izinsana. Lesi sifo chromosomal iyona wafunda kakhulu futhi eyaziwa ngokuthi i-Down Syndrome.

Ngo elifanayo 1959 ke wahlolwa futhi kungase kutholakale ukuthi khona owesilisa extra X chromosome kuholela isifo Klinefelter sika lapho umuntu ohlushwa retardation engqondo kanye nenzalo.

Nokho, naphezu kweqiniso lokuthi kwezinso chromosomal kuthiwa ebuka futhi ecwaninga isikhathi eside, ngisho kwezokwelapha zanamuhla akakwazi ukwelapha izifo zofuzo. Kodwa kunalokho olwesimanje izindlela ukuxilongwa ukuguquka kwezakhi zofuzo enjalo.

Izimbangela-chromosome eyengeziwe

I anomaly yisona sizathu kuphela ukuvela chromosome 47 esikhundleni ompetha 46. emkhakheni wezokwelapha iye kungase kutholakale ukuthi imbangela eyinhloko-chromosome eyengeziwe - engu-umama okhulelwe. I omdala abakhulelwe, aba maningi amathuba nondisjunction. Izinguquko Ezenzeka yalesi sizathu, abesifazane belulekwa ukuba azale engu-35. Ngaphakathi mo of khulelwa lapho kuqala kulonyaka kumele bahlolwe.

I okuyizici ezinomthelela ukuvela-chromosome eyengeziwe, zihlanganisa ezingeni anomalies anda emhlabeni wonke, degree of ukungcoliswa kwemvelo, nokuningi.

Kukholakala ukuthi le-chromosome eyengeziwe kwenzeka uma abekade amacala uhlobo olufanayo. Kuyinto nje inganekwane: ucwaningo luye lwabonisa ukuthi abazali abanezingane uhlushwa izifo chromosomal kukhona karyotype ephelele.

Ukuxilongwa ngokuvakashela ingane nge angahlangani chromosomal

Ukuhlonishwa ukwephulwa-chromosome, ngokuthi ukuhlolwa aneuploidy, ikhomba ukuntula umbungu noma babutha chromosome. Abesifazane abakhulelwe abaneminyaka engama 35 kufanele bangenele inqubo yokuthola isampula-amniotic fluid. Uma sithola ukuthi ukunikezwa kwe-karyotype, umama okhulelwe uzodinga sokuqeda ukukhulelwa, njengoba mntwana wazalelwa zonke ekuphileni uzohlupheka isifo esiyingozi kungekho ukwelashwa okuphumelelayo.

Ukwephulwa Ama-chromosomes e ngokuvamile has a umsuka kwabakhulelwe, Nokho kufanele ihlole indlela hhayi amaseli fetus kuphela, kodwa futhi izinto okuyinto akhiwa ngesikhathi yokuvuthwa. Le nqubo ibizwa ngokuthi sitholakele izifo ezibangelwa ufuzo yomzimba polar.

Down Syndrome

Ososayensi owokuqala owachaza lesi Mongolism is Down. chromosome eyengeziwe, izakhi zofuzo isifo ebukhoneni esidingeka ukuthuthukisa, ibilokhu wafunda kakhulu. Lapho Mongolism kwenzeka ku-chromosome 21 trisomy. Lokho umuntu ogulayo, esikhundleni sabangu-46 uphendulela Ama-chromosomes e-47. The main isici - the lag ekuthuthukisweni.

Izingane ezine khona-chromosome eyengeziwe siyenzeka, nobunzima sina ukufunda impahla ezikoleni, ngakho badinga indlela ehlukile yokufunda. Ngaphezu obusengqondweni, kukhona ukuphambuka, nokuthuthukiswa ngokomzimba, okuyilezi: amehlo lefanele, ungalibalekeli, flat ubuso, izindebe eziningi, ulimi flat, nemilenze mfushane noma enwetshiwe nezinyawo, isixuku esikhulu isikhumba endaweni entanyeni. Ubude bempilo ngokwesilinganiso uneminyaka engu-50.

Patau syndrome

Ibuye ilandise ngezinto trisomy Patau syndrome, lapho kukhona amakhophi amathathu chromosome 13. Isici ehlukile iyona ukuphazamiseka kwesimiso semizwa esiyinhloko noma nokungathuthuki yayo. Iziguli kuyagcinwa kombungu amaningi, kuhlanganise kungenzeka izifo azalwa naso zenhliziyo. Bangaphezu kuka-90% wabantu sifo ka Patau afe onyakeni wokuqala wokuphila.

Edwards syndrome

Lokhu anomaly, anjengezixhumo langaphambilini, libhekisela trisomy. Kulokhu sikhuluma le-chromosome 18. Edwards syndrome libhekene kwempilo. Ngokuyinhloko, iziguli ukukhombisa ithambo ukusonteka, ukuma esishintshile ugebhezi, izinkinga umgudu wokuphefumula futhi senhliziyo. Iminyaka yokuphila kwabantu ngokuvamile mayelana 3 izinyanga, kodwa ezinye izingane ukusinda kuze kube unyaka.

izifo ze-endocrine kanye chromosomal kwezinso

Ngaphezu kwalezi syndromes, chromosomal kwezinso, kukhona abanye lapho kukhona anomaly zezinombolo takhi. Izifo ezihlala zihlanganisa:

1. Triploids - ezingavamile chromosome disorder lapho inombolo yabo eyisibonelo kuyinto 69. Ukukhulelwa kuvame uphela kwesisu ekuqaleni, kodwa ekusindeni kwengane akusho ukuphila hhayi izinyanga ezingaphezu kuka 5, kunezindlela eziningi kwasekuzalweni.
2. Wolf-Hirschhorn syndrome - kubuye omunye kwezinso ezingavamile chromosomal, okuyinto eba ngenxa ngokususwa ekupheleni distal yengalo iDemo chromosome. Umkhakha ezibucayi yalesi sifo 16.3 ku-chromosome 4p. izimpawu ejwayelekile - izinkinga ukuthuthukiswa, retardation ukukhula, ukuquleka, nezici ejwayelekile ebusweni
3. Prader-Willi syndrome - lesi sifo ivelakancane. Lapho enjalo chromosome ezingasadingeki 7 zezakhi zofuzo noma izingxenye 15 chromosome zoyise ayisebenzi, noma ukususwa. Tags: ukugobeka komhlandla, strabismus, imisiwe ukuthuthukiswa nokuhlakanipha, ukukhathala.

Indlela ukukhulisa ingane nge ukuphazamiseka chromosomal?

Ukukhulisa ingane ene-azalwa naso chromosomal isifo akulula. Ukuze wenze ukuphila kwakho kube lula, imithetho ethile okumele ilandelwe. Okokuqala, kufanele ngokushesha unqobe yithemba nokwesaba. Okwesibili, akudingeki ukuba uchithe isikhathi ekufuneni imbangela, ingekho. Okwesithathu, kubalulekile ukunquma phezu uhlobo losizo oludingekayo ukuze ingane nomndeni, bese ukuze ujike Ochwepheshe usizo lwezokwelapha, zokusebenza kwengqondo nemicabango zemfundo.

Ngonyaka wokuqala wokuphila uphethwe kubaluleke kakhulu, njengoba umsebenzi motor ovezwa le nkathi. Ngosizo ochwepheshe ingane ngokushesha ukuthola motor amakhono. Kuyadingeka ukuba ngomqondo ovulekile ukuhlola lo mntwana zokugula obonayo nokuzwa. Futhi, umntwana kufanele obonwa udokotela wezingane endocrinology futhi neuropsychiatrist.

Abazali bakhuthazwa ukuba ungenele inhlangano ekhethekile ukuze uthole iseluleko esiwusizo esisebenzayo esuka kubantu abaye banqoba lesi simo futhi alungele ukwabelana.

Abezindaba chromosome eyengeziwe ngokuvamile friendly, okwenza kube lula ukukhulisa, futhi njengoba zizinhle zabamukela omdala. Izinga ukuthuthukiswa ingane ekhethekile kuzoncika kanzima okuyoba ngayo ukufundisa amakhono ayisisekelo. Izingane ezigulayo, nakuba emuva kwabanye, kodwa zidinga kakhulu ukunakwa. Kuyinto njalo kudingeka ukuba ngincenge ukuzimela wengane. Self bafundiswa ukuthi bangaba kanjani ngesibonelo, bese umphumela ngeke ulinde isikhathi eside.

Izingane nge chromosomal iziyaluyalu afakwa namakhono akhethekile ngubani kwembuleka. Kungaba umculo izifundo noma umdwebo. Kubalulekile ukuthuthukisa umntwana wakho, ukudlala imidlalo asebenzayo nokuthuthukisa motor amakhono, ukufunda, futhi ojwayele umbuso kanye nokunemba. Uma ingane ukuba iveze umbono zonke yami uthando, ukunakekela, ukunakwa nothando, uyosabela e hlobo.

Ingabe likhona ikhambi?

Kuze kube manje, lesi sifo ngeke welaphe chromosome; Ngamunye indlela ehlongozwayo isahlolwa, kodwa ukusebenza kwazo ngempumelelo emitholampilo engakaze lawo. Sithuthuke ukuthuthukiswa komphakathi kanye ekutholeni amakghono kusiza usizo lwezempilo kanye zemfundo ehlelekile.

Ingane egulayo kumele ngaso sonke isikhathi esabonwa Ochwepheshe njengoba imithi wafika ezingeni lapho iyakwazi ukunikeza impahla edingekayo kanye nezinhlobo ezahlukene ukwelashwa. Othisha ziyasebenza izindlela zanamuhla ekufundiseni kanye nokusizwa kwalabo abangaboni ingane.