The 2 events during meiosis that increase genetic variation by ensuring that each egg and each sperm will be unique are Crossing over and the independent assortment.
The meiotic mechanisms involved in genetic variation include crossing over between homologous chromosomes (prophase), the random lining of homologous chromosomes (metaphase), and independent assortment (anaphase).
During prophase I of meiosis, crossing-over events take place between two homologous chromosomes. It takes place close to the equator and genetically alters the offspring cells from the parent cell. Homologous chromosomes randomly align in the equatorial plane during metaphase I with their kinetochores pointing in opposite directions.
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