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When are chaismata first seen during cell division?

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tinacullen-13 | Student, Undergraduate | (Level 1) Honors

Posted April 26, 2013 at 5:57 PM via web

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When are chaismata first seen during cell division?

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Kay Morse | College Teacher | (Level 1) Senior Educator

Posted April 26, 2013 at 11:48 PM (Answer #1)

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The science of genetics isn't yet so advanced as to have a definitive answer to this, but there is a sound scientific theory as to when chiasmata (plural) are first seen.

A chiasma is a point where non-sister chromatids exchange genetic material.

It is thought that the exchange at chiasmata occurs during meiosis during the chromosomal crossover pachytene phase.

Then, the chiasmata first become visible, still during meiosis, during the diplotene stage of prophase I of meiosis. (Wikipedia)

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