The event you are describing is called a pericentric inversion or sometimes a pericentric translocation, where a segment of a chromosome breaks, rotates 180 degrees, and then reattaches to the same chromosome but with the wrong ends. This process involves the breaks occurring on either side of the chromosome's centromere.
What is the name of the event during gametogenesis when pieces of chromosomes may reunited at correct sites but with wrong ends?
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