* During late diakinesis the nucleolus disappears and nuclear membrane also breaks down. * The last stage, diakinesis is characterized by terminalisation of chiasmata. Such X-shaped regions are referred as "Chiasmata". * This results in separation of bivalents from each other except at the regions of crossing over. * The dissolution of synaptonemal complex occurs during diplotene stage. However, during mitosis DNA needs to be more tightly packed to allow for easier separation in anaphase. During DNA replication, genetic material is loosely packed as chromatin. This is mediated by an enzyme "recombinase". Prophase Each chromosome is made of two genetically identical chromatids, joined by a centromere. * Crossing over is exchange of genetical material between two homoglous chromosomes. * During pachytene formation of recombination nodules results at the site where crossing over occurs between non-sister chromatids of homoglous chromosomes. homologous chromosomes during synapsis at the first meiotic prophase and metaphase. The continuous process of mitosis can be divided into two phases i.e., karyokinesis the division of nucleus and cytokinesis the division of cytoplasm or you can say that division of the whole cell. * This chromosomal synapsis is generally followed by the formation of complex structure called "Synaptonemal complex" which leads to formation of "bivalent" (or) "tetrad of chromatids". Cytokinesis (cell division) begins during late anaphase. * Such chromosomes are called "homologous chromosomes". Encontre mais imagens em alta resolução no acervo da iStock, que inclui um banco de ilustrações e vetores de Anatomia disponível para download rápido e fácil. * This compaction of chromosomes lasts throughout leptotene. Baixe agora mesmo a ilustração Divisão Meiotic De Uma Célula Animal Diagrama De Meiose Prophase Metafase Anaphase E Telophase. * It is further divided into 5 phases based on behaviour of chromosomes. ![]() * This is a typically longer and complex phase.
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