Answer:
Crossing Over and Independent Assortment.
Step-by-step explanation:
Crossing over: In Prophase I of Meiosis I, homologous chromosomes line up their chromatids and "cross-over", or exchange corresponding segments of DNA with each other. This produces genetic variation by allowing more combinations of genes to be produced.
Independent Assortment: In Anaphase I of Meiosis I, homologues separate and move to opposite sides of the cell. Resulting cells have one chromosome from each pair of homologous chromosomes. However, WHICH chromosome that each cell gets is completely random.