Ke e 'meli-lebasetere phetoho seo

Melao ea lefa la Mendel bakeng monohybrid leketla sefapanong bolokoa tabeng ea tse ngata tse rarahaneng tse peli-lebasetere. Ka mofuta ona wa sebelisana motsoali oa liforomo fapana ka lipara tse peli ea litšobotsi tse fapaneng.

Nahana ka mohlala oa Mendel dihybrid sefapanong le netefatso melao. Tšela mefuta e sa tsoaneng tse peli tsa dierekisi: ka lipalesa tse tšoeu le mophethong tloaelehile le lipalesa pherese le o molelele o mopopotlong. All batho ba pele-molokong o mong ka o ne a ena e tloaelehileng lipalesa tse tšoeu le whisk ho. From ena re etsa qeto ea hore 'mala o mosoeu (denoted ke C) le bolelele tloaelehile (ngola E) - ke ' muso o hlaheletseng likarolo 'mala o pherese (s) le e elongate whisk (e) - recessive. Ha ho intša peo e nyalane ea molokong o mong ka pele ea limela e arola. Ka lebaka la ho hlaka theha tšela sekemeng.

Pele sefapanong: P1: x CCEE CCEE

G 2Ss le 2Ee

f1 CCEE

The ho tlolelana ha liphoofolo ea bobeli (selfing f1 nyalisitsoeng) P2: x CCEE CCEE. Dihybrid leketla sefapanong tsoela ho theha mefuta e 16 ea zygotes. E mong le e gamete tla ba le moemeli e mong ho lipara phatsa ea lefutso le P-le E-E lipara. Ha C ena phatsa ea lefutso le kgonego lekanang ka ho kopantswe le E kapa e le eena, 'me ka kopana le E kapa E la sephetho le lebasetere CCEE diforomo le maqhubu a lekanang ya mefuta gamete 4: .. CE, Ge, Ce, CE. Obedin hammoho, ba theha phelang joalo: 9 le tloaelehile tšoeu corolla, le 3 tšoeu elongate whisk 3 le le tloaelehileng mophethong magenta le magenta 1 nang le mophethong o molelele o.

Molokong oa bobeli ke tšela poone e nyalisitsoeng ntle, ntle tšoanang liforomo batsoali, tsa dibopeho tse di thehoa le motswako e ncha ka batho ba hlahang (combinative kapa a iponahatsa liphatsa tsa lefutso). ketsahalo ena e phetha karolo ea bohlokoa ka ho iphetola ha lintho ea chai tlhakantsuke e ntjha ya mekhoa etsehang. Hape ka mafolofolo o ile a sebelisa ka ho ikatisa, moo crossbreeding ea limela le liphoofolo tsa mefuta e sa tsoaneng ba ntlafala le ntseng e tsoela pele ho etsa hore ho ka khoneha ho kenyelletsa mefuta e mecha.

palo ea phenotypes ka F2 e ka tlase ho palo ea genotypes. Sena ke ka ntlha ya go ha e le hantle hore le bonngoeng ba diretswe go dira gametes fapaneng ka fana ka e tšoanang le litšobotsi tse morphological. Ho joalo, re fumana ho petsoha phenotype e - 9: 3: 3: 1.

Ena phetoho peli lebasetere ke khoneha ha liphatsa tsa lefutso e ka sehloohong ba sebakeng chromosomes nonhomologous. Cytological motheong oa jwalo tshwaragano le botjha - meiosis le peō. Mendel hlokometse hore le joalo sebelisana ea liphatsa tsa lefutso e mong le e para ea litšobotsi futsitseng ntle ho e 'ngoe, ka bolokolohi ntse kopanngoa ka tlhakantsuke khoneha (ikemetseng lefa la).

dipaterone tsohle ka lefa leo Mendel behela le 'ngoe le e' meli-lebasetere ho tlolelana ha liphoofolo, bath tsa tlhakantsuke rarahaneng ho feta. Ho joalo, poligibridnoe tšela ho etsahala ha lintho tse phelang li nkoa hlaheletseng makgetheng ena tharo kapa ho feta a bapisa. Ka pelo ea logan ona diretswe go dira gametes le kabobotjha oa boitsebiso bo liphatseng tsa lefutso ke melao ea tshilo ya dijo le ikemetseng oa lefa.

From se boletsoeng ka holimo, re etsa qeto ea hore e 'meli-lebasetere phetoho - e le hantle, ke e' meli le nosi-fihla lelibohong la ba tloaelehileng, moo e 'ngoe ea matsoho e meng e elwa hloko (monohybrid). Sena ke 'nete bakeng sa limela le liphoofolo.