Gametogenesis is described as:

• A. Division of somatic cells by mitosis
• B. Process in which meiotic divisions produce mature gametes
• C. Replication of DNA
• D. Formation of a zygote

Answer: (B)

Gametogenesis is the formation of gametes—sperm and eggs—through meiotic cell divisions that reduce chromosome number and create genetic variation. Because meiosis yields mature gametes, the statement describing meiotic divisions producing mature gametes is the best description of gametogenesis. The other ideas refer to different processes: mitotic division of somatic cells creates body cells, not gametes; DNA replication occurs before cell division but isn’t the full process of forming gametes; and a zygote forms when two gametes unite, not during gamete production.