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, not during prophase I or II.
• Independent assortment occurs during metaphase I, not prophase I.
• Chromosome replication occurs before meiosis (interphase), not during prophase I or II.
• Crossing - over occurs during prophase I. Homologous chromosomes pair up (synapsis) and exchange genetic material. In prophase II, there are no homologous chromosomes to pair up and cross - over as the homologous chromosomes have already separated in meiosis I.

Answer:

crossing over