Answer:
Crossing-over or Recombination
Explanation:
Crossing-over is an important phenomenon that allows genetic diversity among species. It is a pretty unique to only meiosis. Crossing-over is the exchange of chromosomal segment between non-sister chromatids of homologous chromosomes. It occurs during the Prophase I stage of meiosis I which homologous chromosomes lie side by side to form a TETRAD structure.
This tetrad structure allows the segment of two non-sister chromatids (containing genes) to break off and be reattached to one another. This is called CROSSING-OVER. It allows the genetic composition of the resulting daughter cells (gametes) to be different from the parent's.
