Chiasma

... But they must have also thought that chromosomes undergoing crossovers looked something like the Greek letter chi, because that’s where the word chiasma (pl chiasmata) comes from; shaped like a chi.

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Where do the chiasma of chromosomal crossovers occur? Are they mostly random or mostly induced? I briefly read of crossover-hotspot-instigator (chi) sequences, which encourage crossover at those points, and also that crossovers ...

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... parent cell. (I think True) 3. DNA replication occurs during both mitosis and meiosis. (I think false. It occurs before mit/mei in interphase?) 4. Chiasma formation occurs during meiosis but not mitosis (True) 5. In both mitosis and meiosis, chromosomes are at their most compacted at metaphase. ...

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... DNA crossover. (a) Two homologous pairs of sister chromatids align side by side. (b) The two homologs are connected at a certain point called chiasma. (c) The two homologs exchange the DNA segment from the chiasma to the end of chromosomes.

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