Qhov sib txawv tseem ceeb ntawm metaphase 1 thiab 2 yog tias nyob rau hauv metaphase 1, homologous chromosomes khub ntawm metaphase phaj thaum nyob rau hauv metaphase 2, tib chromosomes kab ntawm metaphase phaj.
Meiosis yog cov txheej txheem uas hloov lub cell diploid mus rau plaub lub hlwb haploid thaum lub sijhawm gamete tsim. Nws yog ib qho tseem ceeb txheej txheem txij li thaum nws ua rau kom muaj ntau haiv neeg ntawm cov xeeb ntxwv. Meiosis yog qhov tseem ceeb hauv kev sib deev vim nws qhov tseem ceeb hauv kev tsim cov cell haploid. Meiosis tshwm sim los ntawm ob qhov kev faib ua tiav nuclear hu ua meiosis I thiab meiosis II. Txhua qhov kev faib hluav taws xob tuaj yeem muab faib ua dua rau hauv Prophase, Metaphase, Anaphase thiab Telophase. Li no, metaphase yog theem ntawm kev faib cell uas cov chromosomes npaj raws li Metaphase phaj. Metaphase 1 tuaj yeem pom hauv meiosis I thaum metaphase 2 tuaj yeem pom hauv meiosis II. Metaphase 1 thiab 2 txawv ntawm ib leeg.
Metaphase 1 yog dab tsi?
Metaphase 1 yog metaphase ntawm meiosis 1. Thaum lub sijhawm no, cov khub ntawm homologous chromosomes npaj rau ntawm lub phaj metaphase ntawm tes, thiab tom qab ntawd lawv khi rau meiotic spindle los ntawm centromeres. Lub sijhawm no, cov centrioles tuaj yeem pom ntawm tus ncej ntawm qhov sib faib ntawm tes.
Daim duab 01: Metaphase 1
Cov khub ntawm homologous chromosomes tau txuas rau cov spindle fibers los ntawm txhua tus ncej, ntawm cov sab nraud. Nyob rau theem no, lub cell muaj tag nrho cov chromosomes. Metaphase 1 tshwm sim tom qab prophase 1. Anaphase 1 yog theem tom ntej tom qab metaphase 1.
Metaphase 2 yog dab tsi?
Cov metaphase pom hauv meiosis 2 hu ua metaphase 2. Cov xwm txheej tshwm sim hauv metaphase 2 zoo ib yam li metaphase ntawm mitosis. Thaum lub sij hawm metaphase 2, tib chromosomes npaj rau hauv lub phaj metaphase.
Daim duab 02: Metaphase 2
Vim li no nws txawv ntawm qhov metaphase 1 txij li cov khub ntawm homologous chromosomes npaj rau hauv cov phaj metaphase. Tom qab ntawd mus rau txhua lub centromere ntawm chromosome, spindle fibers los ntawm txhua tus ncej txuas. Nyob rau theem no, lub cell muaj ib nrab ntawm cov chromosomes uas nyob rau hauv niam txiv cell. Metaphase 2 tshwm sim tom qab prophase 2. Anaphase 2 yog theem tom ntej tom qab metaphase 2.
Qhov Zoo sib xws ntawm Metaphase 1 thiab 2 yog dab tsi?
- Metaphase 1 thiab 2 yog theem ntawm meiosis.
- Lawv koom nrog rau kev tsim gametes los ntawm cov hlwb diploid.
- Nyob rau hauv ob theem, chromosomes tuaj rau hauv nruab nrab ntawm tes.
- Tsis tas li ntawd, spindle fibers txuas nrog centromeres ntawm chromosomes hauv txhua theem.
Qhov txawv ntawm Metaphase 1 thiab 2 yog dab tsi?
Meiosis tshwm sim los ntawm ob lub voj voog, uas yog meiosis 1 thiab 2. Txhua lub voj voog meiotic muaj plaub ntu. Metaphase ntawm meiosis 1 yog hu ua metaphase 1 thaum metaphase ntawm meiosis 2 hu ua meiosis 2. Hauv metaphase 1, khub ntawm homologous chromosomes kab nyob rau hauv nruab nrab ntawm lub cell thaum ib chromosomes kab nyob rau hauv nruab nrab ntawm metaphase 2. Qhov no yog qhov txawv ntawm metaphase 1 thiab 2.
Lwm qhov sib txawv tseem ceeb ntawm metaphase 1 thiab 2 yog tias, hauv metaphase 1, cov spindle fibers tau txuas rau ob lub centromeres ntawm txhua homologous chromosome whereas, hauv metaphase 2, cov spindle fibers tau txuas rau ib lub centromere los ntawm ob sab.
Cov hauv qab no infographic nthuav tawm qhov sib txawv ntawm metaphase 1 thiab 2 hauv daim ntawv tabular rau kev siv ceev.
Summary – Metaphase 1 vs 2
Meiosis yog ib qho ntawm ob hom kev faib cell. Nws xav tau kev sib deev kev sib deev rau kev tsim gametes. Meiosis muaj ob lub voj voog loj uas yog thawj lub voj voog meiotic thiab thib ob lub voj voog meiotic, thiab thaum kawg, nws ua rau plaub tus ntxhais haploid hlwb los ntawm ib lub cell diploid. Hauv txhua lub voj voog meiotic, muaj plaub theem tseem ceeb. Lawv yog prophase, metaphase, anaphase thiab telophase. Metaphase 1 belongs rau meiosis 1, thiab metaphase 2 belongs rau meiosis 2. Thaum lub sij hawm metaphase 1, khub ntawm homologous chromosomes teem rau nruab nrab ntawm tes thaum metaphase 2, tib chromosomes teem rau nruab nrab. Qhov no yog qhov txawv ntawm metaphase 1 thiab 2.
