Qhov Tseem Ceeb Qhov txawv – Secondary Oocyte vs Ovum
Gametes yog cov hlwb loj hlob haploid kev sib deev uas muaj peev xwm ntawm kev yug menyuam thaum yug menyuam. Cov txheej txheem uas tsim gametes yog hu ua gametogenesis. Meiosis yog qhov tshwm sim tseem ceeb uas tshwm sim hauv gametogenesis. Haploid gametes yog tsim los ntawm niam txiv diploid gametocytes los ntawm meiosis. Gametogenesis txawv ntawm cov txiv neej thiab poj niam. Hauv tib neeg, txiv neej gametes hu ua phev thiab cov txheej txheem uas tsim cov phev hu ua spermatogenesis. Poj niam gametes hu ua qe qe los yog ov thiab cov txheej txheem uas tsim cov ova paub tab yog hu ua oogenesis. Oogenesis yog txheej txheem nyuaj tshaj li spermatogenesis. Oogenesis pib txawm ua ntej yug tus poj niam tus me nyuam. Oocytes yog cov poj niam gametocytes uas dhau mus rau meiosis los ua ova. Lawv yog cov tsis paub qab hau diploid hlwb tsim nyob rau hauv lub zes qe menyuam ntawm cov poj niam. Oocytes faib los ntawm ob lub meiotic cell divisions los tsim cov laus ov. Thaum ib qho oocyte pib paub tab thiab faib, nws yog hu ua thawj oocyte. Thawj oocyte yog raug rau thawj meiotic faib thiab tsim cov oocyte theem nrab. Secondary oocyte yog ib tug poj niam tsis paub qab hau gamete tsim tom qab ua tiav ntawm meiosis I. Qhov thib ob theem ntawm meiosis yog ncua mus txog rau thaum lub thib ob oocyte yog fertilized nrog ib tug phev. Tsis ntev tom qab fertilization, theem nrab oocyte undergoes meiosis II thiab tsim cov qe qe hlwb hu ua ovum. Ovum nucleus fuses nrog phev nucleus thiab tsim cov zygote, uas tuaj yeem loj hlob mus rau ib tus neeg. Qhov sib txawv tseem ceeb ntawm theem nrab oocyte thiab zes qe menyuam yog qhov thib ob oocyte yog ib qho qe qe tsis paub qab hau uas tau tsim tom qab thawj zaug meiotic division thaum ovum yog cov laus gamete uas tau tsim tom qab kev faib meiosis thib ob.
Secondary Oocyte yog dab tsi?
Secondary oocyte yog ib tug poj niam tsis paub qab hau gamete uas tsim los ntawm thawj oocyte thaum lub sij hawm oogenesis. Thaum oogenesis pib, thawj oocytes uas muaj 46 chromosomes, ua ntej meiotic cell division. Nws ua rau cov oocytes theem nrab uas muaj cov chromosomes haploid (23 chromosomes). Secondary oocyte undergoes thib ob meiotic cell faib thiab tsim cov poj niam laus gamete, uas yog ovum. Thib ob meiosis raug ntes kom txog thaum lub thib ob oocyte fertilized nrog cov phev. Tsis ntev tom qab fertilization, meiosis ua tiav thiab tsim lub qe qe.
Daim duab 01: Oogenesis thiab Secondary Oocyte
Secondary oocyte yog ib lub xovtooj loj dua uas muaj cov cytoplasm loj, cov khoom noj khoom haus, thiab cov organelles. Thaum nws tau fertilized, nws tsim ib lub cell loj hlob hu ua ovum thiab lub cev polar. Thaum lub sij hawm oogenesis, cytoplasm faib tsis sib npaug. Feem ntau ntawm cov cytoplasm tuaj rau hauv lub oocyte thib ob thiab tom qab ntawd mus rau lub zes qe menyuam. Nws yog ib qho tseem ceeb kom muaj cytoplasm vim zygote tau txais cytoplasm nkaus xwb los ntawm lub qe cell.
Ovum yog dab tsi?
Ovum yog cov kab mob loj hlob ntawm tus poj niam uas npaj txhij mus fuse nrog txiv neej kab mob. Nws yog qhov kawg tshwm sim ntawm oogenesis. Ovum muaj cov chromosomes haploid thiab nws tuaj yeem tsim cov kab mob tshiab, uas muaj tus lej diploid ntawm chromosomes tom qab fusing nrog haploid phev cell.
Daim duab 02: Ovum
Tib neeg ovum yog lub cell loj dua thiab nws muaj cov protoplasm uas muaj qee cov qe. Protoplasm yog nyob rau hauv ib lub cell phab ntsa uas muaj ob txheej: sab hauv (zona pellucida) thiab txheej txheej (vitelline membrane). Hauv lub zes qe menyuam, muaj cov nucleus loj dua.
Dab tsi zoo sib xws ntawm Secondary Oocyte thiab Ovum?
- Secondary oocyte thiab ovum muaj 23 chromosomes.
- Ob lub hlwb yog haploid.
- Ob lub hlwb raug tsim tawm hauv cov poj niam cev xeeb tub.
- Ob lub hlwb yog cov khoom ntawm poj niam gametogenesis.
Qhov txawv ntawm Secondary Oocyte thiab Ovum yog dab tsi?
Secondary Oocyte vs Ovum |
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| Secondary oocyte yog ib tug poj niam tsis paub qab hau gamete uas tshwm sim los ntawm thawj meiotic faib ntawm thawj oocyte. | Ovum yog cov poj niam cov kab mob ua tiav uas tau ua tiav qhov kev loj hlob los fuse nrog txiv neej kab mob. |
| Kev Ua tiav Meiosis I thiab II | |
| Secondary oocyte tau ua tiav ib theem ntawm meiosis | Ovum tau ua tiav theem ob ntawm meiosis. |
| Secondary oocyte yog ib lub cell tsis paub tab. | Ovum is a mature cell. |
| Secondary oocyte yog muab los ntawm thawj oocyte. | Ovum yog muab los ntawm qhov thib ob oocyte. |
| Muaj peev xwm faib | |
| Secondary oocyte tuaj yeem raug meiosis. | Ovum tsis tuaj yeem hla meiosis. |
Summary – Secondary Oocyte vs Ovum
Oogenesis yog cov txheej txheem uas tsim cov poj niam cov kab mob uas paub tab uas yog hu ua ovum. Oogenesis muaj ob lub cell loj; meiosis I thiab meiosis II. Thawj oocytes pib lub oogenesis thiab faib mus rau theem nrab oocytes thiab polar lub cev. Secondary oocytes yog cov poj niam tsis paub tab gametes uas tsis tau txais qhov kev loj hlob zoo los fuse nrog txiv neej kab mob. Secondary oocyte undergoes thib ob meiosis division thiab tsim ib tug paub tab poj niam kab mob hu ua ovum thiab ib tug polar lub cev. Ovum yog qhov khoom kawg ntawm oogenesis. Nws yog mature txaus los fuse nrog txiv neej kab mob cell nucleus thiab tsim ib zygote. Secondary oocyte yog ib qho khoom nruab nrab ntawm oogenesis whereas ovum yog cov khoom tiav kawg ntawm oogenesis. Qhov no yog qhov sib txawv ntawm theem nrab oocyte thiab ovum. Secondary oocytes thiab ova yog cov hlwb loj tshaj plaws nyob rau hauv poj niam lub cev.
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