Synapsis tshwm sim thaum lub sijhawm prophase I ntawm meiosis. Thaum homologous chromosomes synapse, lawv qhov kawg yog thawj zaug txuas rau lub hnab ntawv nuclear. Cov kawg-membrane complexes ces tsiv teb tsaws, pab los ntawm extranuclear cytoskeleton, kom txog rau thaum qhov sib tw kawg tau ua khub.
Puas synapsis tshwm sim hauv zygotene?
Teb tiav: Hauv meiosis kuv, kev npaj synapsis yuav siv qhov chaw at zygotene theem ntawm prophase-I. Nws yog theem ob ntawm prophase-I. Thaum lub sijhawm no, chromosomes pib koom nrog; qhov no yog hu ua synapsis. Cov chromosomes no hu ua homologous chromosomes.
Puas synapsis tshwm sim hauv prophase II?
Qee zaus synapsis tshwm sim ntawm non-homologous chromosomes. … Thaum meiosis I, meiosis II, thiab mitosis tag nrho suav nrog prophase, synapsis raug txwv rau prophase I ntawm meiosis vim tias qhov no yog tib lub sijhawm homologous chromosomes ua ke nrog ib leeg. Muaj qee qhov tshwj xeeb tsis tshua muaj thaum hla dhau tshwm sim hauv mitosis.
Dab tsi yog Synapse thiab hla dhau?
Qhov sib txawv tseem ceeb ntawm synapsis thiab hla dhau yog qhov kev sib txuas yog qhov sib txuas ntawm homologous chromosomes thaum lub sijhawm prophase 1 ntawm meiosis 1 whereas hla dhau yog kev sib pauv ntawm cov khoom siv caj ces thaum lub sijhawm synapsis.
Puas synapsis tshwm sim ua ntej?
Function of Synapsis
Ua ntej, nws tuav cov homologous chromosomes ua ke los ntawm metaphase I ntawm meiosis I, uas tso cai rau lawvyuav tsum tau ua raws li cov phaj metaphase thiab sib cais. Qhov no yog ib txoj hauj lwm tseem ceeb thaum lub sij hawm meiosis, vim qhov no yog li cas cov ntaub ntawv caj ces hauv txhua gamete raug txo.
