Question

besides recombination, what other event in meiosis increases the genetic diversity of the gametes?
the random line - up and separation of maternal and paternal chromosomes
the random exchange of dna segments between maternal chromosomes
the way in which chromosomes are replicated in meiosis ii
the random way in which gametes fuse together to make uniquely different sperm and eggs
the random exchange of dna segments between patenal chromosomes

Explanation:

• Option 1: During meiosis I, homologous chromosomes (one maternal and one paternal) line up randomly at the metaphase plate (independent assortment). Then they separate, and the combination of maternal and paternal chromosomes that end up in each daughter cell (and eventually in gametes) is random. This increases genetic diversity as different combinations of parental chromosomes are passed on.
• Option 2: Exchange of DNA segments occurs between homologous (maternal - paternal) chromosomes, not just between maternal chromosomes. So this is incorrect.
• Option 3: Chromosome replication occurs in meiosis I (before meiosis starts, in the S - phase), not in meiosis II. Meiosis II is similar to mitosis where sister chromatids separate. So this is wrong.
• Option 4: The fusion of gametes (fertilization) is a post - meiosis event. The question is about events in meiosis. So this is not relevant.
• Option 5: DNA segment exchange is between homologous (maternal - paternal) chromosomes, not just between paternal chromosomes. So this is incorrect.

Answer:

the random line - up and separation of maternal and paternal chromosomes