Cov txheej txheem:
- Puas txuas lossis tsis txuas cov noob sib txuas?
- Puas hla dhau tshwm sim thaum lub sijhawm hloov pauv noob?
- Kev hla dhau qhov tshwm sim hauv cov noob nyob qhov twg?
- Puas hla dhau ntawm Pachytene?
Video: Puas hla dhau tshwm sim hauv cov noob tsis txuas?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Feem ntau, kev hla ntawm cov chromatids uas tsis yog tus menyuam yuav tshwm sim ntawm cov noob thaum lawv nyob deb ntawm cov homologous chromosomes thaum sib koom ua ke. … Yog li ntawd, unlinked genes tej zaum yuav nyob ntawm txawv chromosomes los yog nyob deb ntawm tib chromosome.
Puas txuas lossis tsis txuas cov noob sib txuas?
1: Txuas cov noob tuaj yeem sib cais los ntawm kev sib xyaw ua ke: Cov txheej txheem ntawm kev sib tw, lossis kev sib koom ua ke, tshwm sim thaum ob homologous chromosomes sib dhos thaum lub sij hawm meiosis thiab pauv ib ntu ntawm cov khoom siv caj ces. Ntawm no, cov alleles rau gene C tau pauv. Qhov tshwm sim yog ob recombinant thiab ob non-recombinant chromosomes.
Puas hla dhau tshwm sim thaum lub sijhawm hloov pauv noob?
Cov pab pawg ntawm cov noob caj noob ces raug xa mus rau "cov tsev neeg cov noob", vim qhov zoo ib yam ntawm lawv cov kab ke thiab lawv cov keeb kwm los ntawm qhovntsej thiaj tsis mob los ntawm cov noob caj noob ces. Kev hloov pauv tshwm sim thaum DNA rov ua dua ua ntej meiosis. Hla hla thaum metaphase I sib tov alleles los ntawm ntau homologues rau hauv kev sib txuas tshiab.
Kev hla dhau qhov tshwm sim hauv cov noob nyob qhov twg?
Kev hla dhau yog kev sib hloov ntawm cov khoom siv caj ces uas tshwm sim hauv kab kab mobThaum lub sij hawm tsim cov qe thiab cov phev hlwb, tseem hu ua meiosis, ua ke chromosomes los ntawm txhua tus niam txiv sib haum. uas zoo sib xws DNA sequences los ntawm khub chromosomes hla ib leeg.
Puas hla dhau ntawm Pachytene?
Thaum lub sijhawm meiosis, hla dhau tshwm sim ntawm theem pachytene, thaum homologous chromosomes tau ua khub tag nrho. Ntawm diplotene, thaum homologs sib cais, qhov chaw ntawm kev hla dhau los ua pom zoo li chiasmata, uas tuav ob homologs ntawm bivalent ua ke kom txog thaum sib cais ntawm anaphase I.
Pom zoo:
Puas yog kev tshwm sim lossis kev tshwm sim?
Reveling, kuj spelled reveling, txhais tau tias muaj lub sij hawm zoo, los yog zoo siab rau ib yam dab tsi. Yog tias koj tawm mus ua kev zoo siab rau koj kawm tiav thiab koj haus dej haus, tog thiab muaj lub sijhawm zoo, qhov no yog qhov piv txwv ntawm thaum koj rov qab los .
Noob noob noob noob yog dab tsi?
A monogerm noob muaj ib lub embryo nkaus xwbCov txiv hmab txiv ntoo ntawm qee cov nroj tsuag (xws li beet qab zib) feem ntau siv rau kev nthuav tawm thiab feem ntau nws muaj ntau yam noob. Txawm li cas los xij, cov txiv hmab txiv ntoo no tuaj yeem hloov kho cov noob caj noob ces kom muaj ib lub noob los yog cov khoom tawg yooj yim los ua monogerm .
Yuav ua li cas tshwm sim hauv kuv mob siab heev tshwm sim?
Thaum zaj yeeb yaj kiab tsis qhia meej raws li ib zaj dab neeg tseeb, nws yog tsim los ntawm cov xwm txheej hauv lub neej tiag tiag: yog, ntau tus neeg saib xyuas kev dag ntxias tau nyiag kev nplua nuj thiab kev ywj pheej ntawm suav tsis txheeb.
Cov siphons tshwm sim thiab tshwm sim nyob qhov twg?
Ntawm ob qhov qhib ntawm tom qab kawg ntawm clam. Qhov qhib qhov ntau dua yog cov siphon uas tshwm sim uas nqa dej mus rau hauv cov clam thiab qhov qhib qhov rooj ntau dua yog cov siphon uas tshwm sim uas cov khib nyiab & dej tawm . Cov kab mob dab tsi muaj tshwm sim thiab Excurrent siphon?
Tsis tau tshwm sim lossis tsis tshwm sim?
The simple yav dhau los feem ntau yog tsim los ntawm daim ntawv preterite ntawm cov lus qhia ("Nws tshwm sim"), tab sis qee zaum rau qhov tseem ceeb, inversion ntawm - zoo li qhov no - negation, nws yog tsim nrog cov ntawv ua: "
