Nomoro ea Chromosome: Motheo oa Liphatsa tsa Lefutso tsa Bophelo
Li-chromosome ke dibopeho tsa macromolecular tse fumanwang ka hara disele tse bapalang karolo ya bohlokwa ho bolokeng le ho hlophiseng tlhahisoleseding ya lefutso. Sephedi se seng le se seng se phelang se na le palo e fapaneng ya di-chromosome, tse etsang qeto ya boitsebiso ba sona ba lefutso. Sengoloa sena se tla hlahloba palo ya di-chromosome mefuteng e fapaneng, bohlokwa ba yona, le kamoo e susumetsang dibopeho tsa baeloji le ho iphetola ha dintho.
Tlhaloso le Sebopeho sa Li-chromosome
Li-chromosome li entsoe ka DNA e phuthetsoeng ho potoloha liprotheine tse bitsoang li-histone. Sena se etsa sebopeho se senyenyane, se hlophisitsoeng, se lumellang polokelo e sebetsang ea tlhahisoleseling ea liphatsa tsa lefutso. Ho batho, li-chromosome li fumaneha ka har'a khubu ea sele 'me li na le tatellano e telele ea DNA e chitja, e jereng liphatsa tsa lefutso tse likete tse thathamisang litaelo tsa baeloji tse hlokahalang bakeng sa kholo, nts'etsopele le ts'ebetso ea sebopuoa se seng le se seng.
Bohlokoa ba Palo ea Chromosome
Palo ea chromosome ke ntlha ea bohlokoa liphatseng tsa lefutso hobane e khetholla botsitso ba genome ea sebōpuoa. Maemong a mangata, palo ea chromosome e amana ka ho toba le bokhoni ba sebōpuoa ba ho ikatisa le ho phela. Batho, mohlala, ba na le lipara tse 23 tsa li-chromosome, tse etsang kakaretso ea 46. Ho lipara tsena tse 23, tse 22 li tsejoa e le li-autosome, 'me para e le' ngoe ke chromosome ea bong, e khethollang bong ba motho ka mong: XX bakeng sa basali le XY bakeng sa banna.
Phapang Palo ea Chromosome Mefuta e Fapaneng
Palo ea li-chromosome e fapana haholo har'a mefuta e fapaneng. Mohlala:
– Batho (Homo sapiens): dikhromosomo tse 46.
- Pere (Equus ferus caballus): li-chromosome tse 64.
- Ntja (Canis lupus familiaris): li-chromosome tse 78.
- Katse (Felis catus): li-chromosome tse 38.
– Semela sa poone (Zea mays): di-chromosome tse 20.
Lefatšeng la limela, diphetoho tsa palo ya di-chromosome di ka ba tse makatsang le ho feta. Dimela tse ding di tlalehilwe di na le di-chromosome tse makgolo ho isa ho tse dikete. Ketsahalo ena e bitswa polyploidy, e etsahalang ha sebopuwa se na le di-chromosome tse fetang tse pedi. Mohlala, dimela tsa koro le ditapole hangata ke diphetho tsa polyploidy.
Phello ea Nomoro ea Chromosome ho Tsoelo-pele
Palo le sebopeho sa di-chromosome di bapala karolo ya bohlokwa phetohong ya diphedi. Diphetoho palong kapa sebopehong sa di-chromosome di ka lebisa diphetohong tse kgolo sebopehong sa lefutso sa sephedi. Mohlala, ho kopana kapa ho arohana ha di-chromosome ho ka lebisa ho speciation, ho thehwa ha mefuta e metjha.
Mohlala o mong o tsebahalang ke ho iphetola ha chromosome 2 ho batho. Batho ba na le chromosome e le 'ngoe e fokolang ho feta beng ka bona ba haufi-ufi, lichimpanzi, tse nang le 48. Tlhahlobo ea liphatsa tsa lefutso e bontša hore chromosome 2 ea motho ke phello ea ho kopana ha li-chromosome tse peli tse arohaneng tsa baholo-holo ho li-primate.
Ho se Tloaelehe ha Palo ea Chromosome
Hase lintho tsohle tse phelang tse bolokang palo e tsitsitseng ea li-chromosome. Ho se tloaelehe ha palo ea li-chromosome ho atile 'me ho ka ba le litlamorao tse kholo, haholo-holo bophelong ba batho. Maemo a mang a liphatsa tsa lefutso a bakoa ke li-chromosome tse eketsehileng kapa tse sieo, tse tsejoang e le aneuploidy. Mehlala ea maemo ana e kenyelletsa:
– Down syndrome: E bakoa ke boteng ba kopi ea boraro ea chromosome 21. Batho ba nang le lefu lena ba na le maemo a fapaneng a ho fokola kelellong le kholo ea 'mele.
– Turner syndrome: Lefu le hlahang ho basali ha e 'ngoe ea li-chromosome tsa X e le sieo ka botlalo kapa ka karolo e itseng, e leng se fellang ka kakaretso ea li-chromosome tse 45.
– Klinefelter syndrome: Boemo ba banna bo kenyeletsang ho ba le chromosome e le 'ngoe kapa tse fetang X tse eketsehileng, hangata 47,XXY.
Lithuto tsena tsa aneuploidy ha li bohlokoa feela bakeng sa tlhahlobo ea bongaka le liphatsa tsa lefutso, empa hape li fana ka temohisiso ea bohlokoa mabapi le kamoo liphetoho tsa chromosome li ka amang phenotype.
Lipatlisiso le Tsoelo-pele Lithutong tsa Chromosome
Tsoelo-pele ea theknoloji baelojing ea limolek'hule e nolofalitse lipatlisiso tse ling ka li-chromosome le palo ea tsona. Mekhoa e kang karyotyping, e re lumellang ho bona li-chromosome ka microscope, le mekhoa ea sejoale-joale joalo ka ho latellana ha genome e fetotse kutloisiso ea rona ea sebopeho le ts'ebetso ea li-chromosome.
Phuputso ea chromosome e boetse e na le lits'ebetso tse sebetsang temong le bongaka. Mohlala, ka ho fetola palo ea li-chromosome limela, bo-rasaense ba ka hlahisa mefuta e mecha e hanyetsanang le mafu kapa e nang le chai e ngata. Bongaka, ho utloisisa li-chromosome le liphatsa tsa lefutso ho thusa nts'etsopele ea phekolo ea liphatsa tsa lefutso le meriana e nepahetseng e shebaneng le mathata a itseng a liphatsa tsa lefutso.
Qetello
Palo ea chromosome ke karolo ea bohlokoa baelojing ea liphatsa tsa lefutso e susumetsang ts'ebetso le kholo ea lintho tse phelang. Mefuta e fapaneng ea lipalo tsa chromosome tlhahong e fana ka temohisiso e tebileng mabapi le hore na bophelo bo ikamahanya le maemo joang le ho atleha maemong a fapaneng a tikoloho. Ha theknoloji le mekhoa ea lipatlisiso li ntse li tsoela pele, kutloisiso ea rona ea li-chromosome e tla tsoela pele ho hola, e thusa ho rarolla liphiri tsa liphatsa tsa lefutso tse sa rarolloang le ho fana ka litharollo tse ncha bakeng sa liphephetso tsa bophelo bo botle le tsa temo nakong e tlang.
