Video: Gametophyte tsim dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov gametophyte yog tus kev sib deev theem nyob rau hauv lub neej voj voog ntawm cov nroj tsuag thiab algae. Nws tsim cov kab mob sib deev uas tsim tawm gametes, haploid pw ua ke hlwb uas koom rau hauv fertilization los tsim ib tug diploid zygote uas muaj ob txheej chromosomes.
Ntawm no, gametophyte yog dab tsi thiab lawv ua li cas?
A gametophyte yog tsim thaum tiam sporophyte tsim tawm spores. Spores yog tsim los ntawm meiosis lossis cell faib uas txo cov chromosomes los ntawm ib nrab. Cov no hlwb haploid ua Los ntawm sporophytes yog spores. Spores yuav dhau mus rau mitosis kom loj hlob mus rau hauv multicellular haploid gametophyte.
Ib sab saum toj no, Sporophyte tsim dab tsi? A sporophyte yog ib tug multicellular diploid tiam pom nyob rau hauv cov nroj tsuag thiab algae uas undergo alternation ntawm tiam. Nws tsim tawm haploid spores uas loj hlob mus rau hauv gametophyte. Lub gametophyte ces ua gametes uas fuse thiab loj hlob mus rau hauv ib sporophyte . Hauv ntau cov nroj tsuag, cov sporophyte tiam yog tiam tseem ceeb.
Tib neeg kuj nug, dab tsi yog gametophyte tsim quizlet?
Cov ntsiab lus hauv cov teeb no (29) Diploid sporophyte tsim tawm haploid spores los ntawm mieosis, haploid spores ua txiv neej lossis poj niam gametophytes Los ntawm mitosis, fertilize thiab loj hlob mus rau hauv lub sporophyte. - Neeg laus Gametophyte nroj tsuag tsim tawm phev los yog qe, phev raug tso tawm thiab pom nws txoj kev mus rau hauv lub qe.
Lub luag haujlwm ntawm gametophyte yog dab tsi?
Ib tug loj muaj nuj nqi ntawm gametophyte tiam yog los tsim haploid gametes. Kev sib xyaw ntawm cov qe qe nrog cov phev cell ua rau cov sporophyte, yog li ua tiav lub neej voj voog (Raven li al., 1992). Hauv ntau cov nroj tsuag qis, gametophytes yog cov tseem ceeb thiab dawb-nyob tiam.
Pom zoo:
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