DOST Junior Level Science Scholarship (JLSS) Practice Exam

Pattern of gamete production: oogenesis has long interruptions, while spermatogenesis is essentially continuous. In females, oocytes begin development before birth and enter meiosis but are paused in prophase I for years, only resuming periodically during the reproductive years and then arresting again at metaphase II until fertilization. This creates long gaps between the formation of usable eggs. In contrast, males produce sperm after puberty in a steady, ongoing process with spermatogonia continually renewing and advancing through meiosis and maturation, yielding a constant supply of sperm over a person’s reproductive life. That contrast—long pauses in the female process versus continual production in the male process—best matches the statement. The other ideas don’t align with this pattern: the notion that eggs are produced continuously, or that sperm development happens in bursts, or that spermatogenesis starts only in adolescence, doesn’t reflect the continuous nature of male production or the paused, cyclical nature of female development.