Question

meiosis occurs in a series of different phases and creates genetically unique reproductive cells. which process helps make meiotic cells genetically different and occurs during prophase i, but not during prophase ii?
fertilization
independent assortment
crossing over
chromosome replication

Explanation:

Fertilization occurs after meiosis. Independent assortment happens during metaphase I. Chromosome replication occurs before meiosis starts. Crossing - over is the exchange of genetic material between homologous chromosomes and occurs specifically in prophase I of meiosis, contributing to genetic diversity among meiotic cells and not happening in prophase II.

Answer:

crossing over