Cov txheej txheem:
- Puas polyploidy tuag rau tib neeg?
- Puas yog tib neeg diploid lossis polyploid?
- Dab tsi ua rau polyploidy hauv tib neeg?
- polyploidy ua li cas puas tsim nyog?
Video: Tib neeg puas tuaj yeem ua polyploid?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Nyob hauv tib neeg, cov hlwb polyploid yog pom nyob rau hauv cov ntaub so ntswg tseem ceeb, xws li daim siab thiab placenta. Ib lo lus dav dav feem ntau siv los piav txog tiam ntawm cov hlwb polyploid yog endoreplication, uas yog hais txog ntau yam genome duplications yam tsis muaj kev cuam tshuam kev faib / cytokinesis.
Puas polyploidy tuag rau tib neeg?
Ntxim qab kawg, polyploidy yog qhov tuag tsis hais txogntawm kev sib deev phenotype ntawm embryo (piv txwv li, triploid XXX tib neeg, uas loj hlob li poj niam, tuag, zoo li triploid ZZZ qaib, uas loj hlob Raws li cov txiv neej), thiab polyploidy ua rau muaj qhov tsis xws luag hnyav dua li trisomy cuam tshuam nrog kev sib deev chromosomes (diploids nrog X lossis Y ntxiv …
Puas yog tib neeg diploid lossis polyploid?
Tib neeg yog diploid kab mob, ib txwm nqa ob pawg chromosomes tiav hauv lawv cov hlwb somatic: ob daim ntawv ntawm leej txiv thiab leej niam chromosomes, raws li, hauv txhua 23 homologous khub ntawm chromosomes uas tib neeg ib txwm muaj.
Dab tsi ua rau polyploidy hauv tib neeg?
Polyploids tshwm sim thaum muaj qhov tsis tshua muaj mitotic lossis meiotic kev puas tsuaj, xws li kev tsis sib haum xeeb, ua rau tsim cov gametes uas muaj tag nrho cov chromosomes duplicate… Thaum lub diploid gamete fuses nrog a haploid gamete, ib daim ntawv triploid zygote, txawm hais tias cov triploids no feem ntau tsis ruaj khov thiab feem ntau tuaj yeem ua rau tsis muaj menyuam.
polyploidy ua li cas puas tsim nyog?
Kev nce hauv DNA cov ntsiab lus, ib yam li cov ntaub ntawv hauv polyploids, feem ntau ua rau cov cell thiab lub cev loj dua(Müntzing, 1936). … Qhov tshwm sim no tau raug postulated ua ntej raws li "high-ploidy syndrome," qhov twg ntau ploidy theem nthuav tawm kev nthuav dav ntawm tes tab sis txo qis ntawm tes (Tsukaya, 2008).
Pom zoo:
Tib neeg puas tuaj yeem taug kev ntawm lub teeb nrawm?
Peb tsis tuaj yeem ncav cuag qhov nrawm nrawm Los yog, qhov tseeb dua, peb tsis tuaj yeem ncav cuag qhov nrawm ntawm lub tshuab nqus tsev. Ntawd yog, qhov kawg ntawm cosmic ceev txwv, ntawm 299, 792, 458 m / s yog unattainable rau loj hais, thiab ib txhij yog qhov ceev uas tag nrho cov massless hais yuav tsum mus los ntawm .
Tib neeg puas tuaj yeem kis tus kabmob paramyxovirus?
Paramyxovirus hom kab mob feem ntau muaj peev xwm cuam tshuam rau lwm hom avian suav nrog nqaij qaib. Tab sis txog tam sim no, tseem tsis tau muaj kev kuaj pom tus kab mob ntawm cov nqaij qaib. Tib neeg kis tus kab mob no tsis tshua muajthiab feem ntau tshwm sim tsuas yog hauv cov tib neeg uas nyob ze, sib cuag ncaj qha nrog cov noog kis .
Tib neeg puas tuaj yeem ua parthenogenesis?
Spontaneous parthenogenetic thiab androgenetic xwm txheej tshwm sim hauv tib neeg, tab sis lawv ua rau qog: lub zes qe menyuam teratoma thiab hydatidiform mole, feem . tib neeg puas tuaj yeem yug me nyuam zoo li qub? Kev sib deev hauv tib neeg yog ua tiav yam tsis muaj kev siv tam sim ntawd ntawm cov txiv neej thiab poj niam txiv neej cov poj niam sib deev (cov phev thiab qe).
Cov dev mub puas tuaj yeem cuam tshuam tib neeg cov plaub hau?
Txawm tsis tshua muaj, hma tuaj yeem ua rau lawv txoj hauv kev rau tib neeg cov plaub hau Thaum tsis muaj cov tsiaj hauv tsev zoo li miv thiab dev, hma tuaj yeem txiav txim siab los ze rau lawv cov neeg raug tsim txom tom ntej, peb tib neeg, rau lawv cov ntshav tsis tu ncua.
Tus kab mob puas tuaj yeem nqa tib neeg?
Ib tug noog nqa tau ib nrab ntawm nws lub cev hnyav, raws li kev kwv yees. Qhov no suab zoo, tab sis ib tug condor, ib tug ntawm cov loj tshaj plaws noog los ntawm wingspan, hnyav nyob rau hauv ib ncig ntawm 30 phaus . Puas muaj noog tuaj nqa tau tib neeg?
