Synapsis

Please can anyone explain how this happens? How do homologous chromosomes identify each other to pair up? Also What molecular machinery is involved in crossing over and ensuring that it happens at the same point on the two chromosomes?

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The question is: Cell differentiation occurs following: synapsis metaphase I prophase II metaphase II telophase II If I have done my reading correctly, the correct answer is metaphase II Metaphase, from the ancient Greek μετα (after) ...

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... division, into four haploid (N) cell or nuclei, each with one set of chromosomes. In the first of two division, pairing, crossing –over, and synapsis of homologous chromosome occur. The meiotic process, in combination with fertilization, results in the conservation of the number of chromosomes ...

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... center. It also had an unexpected nuclear envelope localization. Dernburg imagines that the nuclear envelope might be a scaffold for pairing and synapsis. AND AS FAR AS THE PLANT GOES..... Nuclease I enzymes are responsible for the degradation of RNA and single-stranded DNA during several plant ...

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... - two cell divisions resulting in four products of meiosis 2. Ploidy (# chromosome sets) per nucleus. mitosis - 2N to 2N meiosis - 2N to N to N 3. Synapsis of homologous chromosomes. mitosis - no pairing meiosis - pairing at zygotene of prophase I 4. Exchange of genetic material between synapsed ...

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