expain prophase in short
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Answer:
the first stage of cell division, before metaphase, during which the chromosomes become visible as paired chromatids and the nuclear envelope disappears. The first prophase of meiosis includes the reduction division.
Most of the events that function to differentiate meiosis from mitosis occur in Prophase I
Homologous chromosomes form bivalents (or tetrads) and crossing over occurs between non-sister chromatids
Prophase I is divided into 5 distinctive sub-stages:
Leptotene – The chromosomes begin to condense and are attached to the nuclear membrane via their telomeres
Zygotene – Synapsis begins with a synaptonemal complex forming between homologous chromosomes
Pachytene – Crossing over of genetic material occurs between non-sister chromatids
Diplotene – Synapsis ends with disappearance of synaptonemal complex; homologous pairs remain attached at chiasmata
Diakinesis – Chromosomes become fully condensed and nuclear membrane disintegrates prior to metaphase 1
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Explanation:
propase is initiated proces in which chromosomes are formee, spindile fibers are prepared in this phase and goes to opposite poles etc