Qhov Tseem Ceeb Qhov txawv - Haplontic vs Diplontic Life Cycles
Nyob rau hauv cov ntsiab lus ntawm biology, ib lub voj voog ntawm lub neej yog ib theem ntawm kev hloov pauv ib yam kabmob kis los ntawm kev yug me nyuam (sexual los yog asexual) uas thaum kawg rov qab mus rau thawj theem pib. Cov txheej txheem no txawv ntawm ib lub cev mus rau lwm qhov. Thaum muaj kev sib deev kev sib deev, lub voj voog ntawm lub neej muaj xws li kev hloov ntawm ploidy; alternation ntawm haploid (n) thiab diploid (2n) theem. Meiosis tshwm sim thaum lub sij hawm hloov ntawm ib theem diploid mus rau theem haploid. Hais txog kev hloov pauv ntawm ploidy, lub neej voj voog yog peb hom. Lawv yog, haplontic, diplontic thiab haplodiplontic. Nyob rau hauv lub neej haplontic, lub haploid theem feem ntau yog multicellular thiab tshwm sim nyob rau hauv lub tsim ntawm ib tug diploid (2n) cell, uas yog ib tug zygote. Lub zygote tau dhau los ntawm meiosis, uas ua rau muaj cov kab mob haploid (n) hlwb. Nyob rau hauv lub voj voog ntawm lub neej, lub diploid theem feem ntau yog multicellular, thiab meiosis tshwm sim thaum lub sij hawm gamete uas ua rau cov khoom ntawm haploid (n) gametes. Thaum lub sij hawm fertilization, lub haploid (n) gametes fuse ua ke nyob rau hauv lub tsim ntawm ib tug diploid (2n) zygote, thiab nws mitotically faib thiab tsim ib tug multicellular diploid (2n) kab mob. Qhov no yog qhov sib txawv tseem ceeb ntawm haplontic thiab diplontic lub neej voj voog.
CONTENTS
1. Txheej txheem cej luam thiab Qhov Tseem Ceeb Qhov txawv
2. Dab tsi yog Haplontic Life Cycle
3. Dab tsi yog Diplontic Life Cycle
4. Zoo sib xws ntawm Haplontic thiab Diplontic Life Cycles
5. Kev sib piv ntawm Ib Sab - Haplontic vs Diplontic Life Cycles hauv Daim Ntawv Qhia
6. Summary
Haplontic Life Cycle yog dab tsi?
Haplontic lub neej voj voog cuam tshuam nrog kev tsim ntawm haploid (n) ib leeg ntawm tes los ntawm meiosis ntawm diploid (2n) zygote. Qhov tshwm sim no tuaj yeem piav qhia nrog sporic meiosis - txheej txheem ntawm kev tsim cov spores. Nyob rau hauv cov txheej txheem no, lub zygote mitotically faib thiab tsim multicellular sporophyte uas yog diploid (2n). Nyob rau hauv lub sporophyte, meiotic cell division tshwm sim thiab ua rau haploid (n) spores. Cov spores undergo mitosis thiab tsim haploid (n) gametes ua ke; Qhov no yog hu ua gametophyte. Gametophyte ua rau tsim gametes ntawm mitosis.
Daim duab 01: Haplontic Life Cycle of Algae
Hauv lub neej haplontic, lub zygote tsuas yog theem diploid (2n) xwb, thiab mitosis tshwm sim tsuas yog nyob rau theem haploid (n) xwb. Txij li thaum ib tus neeg haploid (n) hlwb raug tsim los ntawm mitosis, lub neej voj voog no hu ua haplontic life cycle. Qhov no suav nrog lub neej voj voog ntawm ntau yam protozoa, tag nrho cov fungi, thiab qee hom algae.
Yuav ua li cas yog lub neej Diplontic?
Lub sijhawm gamete tsim, meiosis tshwm sim hauv kev tsim ntawm haploid (n) gametes. Haploid gametes yog tsim los ntawm ib leeg hlwb ntawm cov hlwb diploid los ntawm meiosis. Cov haploid gametes no tsis raug mitosis, thiab lawv tsis loj hlob mus rau hauv lub cev. Hloov chaw, lawv fuse nrog gametes ntawm kev sib deev sib deev thiab tsim ib lub cell diploid uas yog hu ua zygote. Lub diploid (2n) zygote ces tsim mitotically mus rau hauv ib tug diploid (2n) kab mob.
Daim duab 02: Diplontic Life Cycle
Nyob rau hauv lub voj voog lub neej diplontic, tib lub hlwb haploid yog gametes. Meiosis tsuas yog tshwm sim hauv theem diploid. Txij li thaum tus multicellular diploid tus neeg yog ib tug diploid thiab lub gamete undergoes meiosis, nws yog hu ua ib tug diplontic lifecycle.
Dab tsi yog qhov zoo sib xws ntawm Haplontic thiab Diplontic Life Cycles?
- Haplontic thiab diplontic lub neej voj voog yog koom nrog hauv kev tsim gametes thiab kev loj hlob ntawm cov kab mob tshiab.
- Meiosis thiab mitosis tshwm sim hauv ob lub voj voog.
Qhov txawv ntawm Haplontic thiab Diplontic Life Cycles yog dab tsi?
Haplontic vs Diplontic Life Cycles |
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| Nyob rau hauv lub neej haplontic, mitosis tshwm sim nyob rau hauv lub haploid (n) theem uas yog multicellular, thiab lub diploid (2n) theem yog lub zygote uas undergoes meiosis. | Nyob rau hauv lub neej diplontic, lub diploid theem feem ntau yog multicellular, thiab meiosis tshwm sim thaum gamete tsim uas ua rau zus tau tej cov haploid (n) gametes thiab fuse los ua ib tug diploid (2n) zygote. |
| Mitosis | |
| Mitosis tshwm sim hauv theem haploid (n) hauv lub neej haplontic. | Mitosis tsuas yog nyob rau hauv lub diploid (2n) theem ntawm lub neej diplontic. |
| Examples | |
| Txhua cov kab mob, qee hom algae thiab ntau tus protozoans muaj lub neej haplontic. | Tsiaj txhu thiab ob peb xim av algae muaj lub voj voog lub neej diplontic. |
Summary – Haplontic vs Diplontic Life Cycles
Lub voj voog ntawm lub neej yog hu ua cov xwm txheej uas tshwm sim hauv ib lub cev los ntawm kev sib deev lossis kev sib deev uas thaum kawg rov qab mus rau thawj theem pib. Lub neej voj voog txawv ntawm qhov sib txawv. Alternation ntawm tiam yuav siv qhov chaw nyob rau hauv lub neej voj voog ntawm ib tsob nroj. Hauv kev yug me nyuam, kev hloov ntawm ploidy yog peb hom; haplontic, diplontic thiab haplodiplontic. Nyob rau hauv lub neej haplontic, mitosis tshwm sim nyob rau hauv lub haploid (n) theem uas yog multicellular, thiab lub diplod (2n) theem yog lub zygote uas undergoes meiosis. Nyob rau hauv lub neej voj voog diplontic, lub diploid theem feem ntau yog multicellular, thiab meiosis tshwm sim thaum lub sij hawm gamete tsim uas ua rau zus tau tej cov haploid (n) gametes thiab fuse los ua ib tug diploid (2n) zygote. Qhov no yog qhov txawv ntawm haplontic thiab diplontic lub neej voj voog.
Download PDF Version of Haplontic vs Diplontic Life Cycles
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Haplontic thiab Diplontic Life Cycles.
