Gametogenesis Knowledge-Based Download PDF

Questions

1. 1.

   During human gametogenesis, which cellular event takes place in the female germ cell lineage exclusively prior to birth?

   • A) Primary oocytes complete meiosis I to produce secondary oocytes.
   • B) Secondary oocytes resume and complete meiosis II to form mature ova.
   • C) Oogonia cease mitotic divisions and enter meiosis I to become primary oocytes.
   • D) First polar bodies divide symmetrically to generate functional female gametes.
2. 2.

   Which cellular event correctly characterizes the process of spermiogenesis during human gametogenesis?

   • A) Mitotic proliferation of primordial germ cells into type A spermatogonia
   • B) Separation of homologous chromosome pairs to form secondary spermatocytes
   • C) Disjunction of sister chromatids to produce round haploid spermatids
   • D) Morphological differentiation of haploid spermatids, including acrosome formation and cytoplasm shedding
3. 3.

   In human spermatogenesis, which cell type is directly produced upon the completion of meiosis I?

   • A) Primary spermatocyte
   • B) Spermatid
   • C) Spermatogonium
   • D) Secondary spermatocyte
4. 4.

   In human oogenesis, primary oocytes remain arrested in which meiotic stage until puberty, and what event triggers the completion of meiosis II?

   • A) Prophase I; penetration of the secondary oocyte by a sperm
   • B) Metaphase I; the surge of luteinizing hormone at ovulation
   • C) Prophase II; the release of the secondary oocyte from the ovary
   • D) Metaphase II; implantation of the developing embryo in the endometrium
5. 5.

   Which of the following statements correctly compares human spermatogenesis and oogenesis?

   • A) Spermatogenesis produces one functional gamete and three non-functional polar bodies from each primary germ cell.
   • B) Oogenesis begins at the onset of puberty and proceeds continuously without any meiotic arrests.
   • C) Cytokinesis is unequal during the meiotic divisions of oogenesis, whereas it is equal in spermatogenesis.
   • D) Primary oocytes complete both meiotic divisions before ovulation occurs in the menstrual cycle.