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2.1 Production of Gametes — Test 1
Q1. The process by which diploid spermatogonia give rise to haploid spermatozoa is called:✓ Spermatogenesis
Q2. Spermiogenesis refers to the:✓ Transformation of a round spermatid into a mature, motile spermatozoon
Q3. The transition from mitotically dividing spermatogonia to meiotically dividing spermatocytes is promoted by:✓ Retinoic acid
Q4. Amphibian oocytes remain arrested for long periods in which stage of meiosis?✓ Diplotene of prophase I
Q5. In amphibians, resumption of meiosis in the arrested oocyte is initiated by:✓ Progesterone
Q6. Sertoli cells in the testis function mainly to:✓ Nourish and support the developing sperm cells
Q7. The release of mature sperm from the Sertoli cells into the lumen of the seminiferous tubule is called:✓ Spermiation
Q8. Oogenesis differs from spermatogenesis in that oogenesis typically produces:✓ One functional egg and polar bodies per meiosis
Q9. Unequal division during oogenesis ensures that the egg:✓ Retains most of the cytoplasm and stored nutrients
Q10. The first polar body is produced at the end of:✓ Meiosis I in the oocyte
Q11. In many mammals, the oocyte is ovulated while arrested at:✓ Metaphase of meiosis II
Q12. Spermatogonia are best described as:✓ Diploid stem cells that give rise to sperm
Q13. A primary spermatocyte undergoes meiosis I to form:✓ Two secondary spermatocytes
Q14. The acrosome of a sperm is derived from the:✓ Golgi apparatus
Q15. The midpiece of a mammalian sperm is packed with mitochondria because it:✓ Provides energy (ATP) for flagellar movement
Q16. The lampbrush chromosomes seen in amphibian oocytes indicate:✓ Active transcription during the long diplotene arrest
Q17. Maturation-promoting factor (MPF), which drives the oocyte into M-phase, is a complex of:✓ Cyclin B and a cyclin-dependent kinase (Cdk1)
Q18. The correct overall sequence in sperm formation is:✓ Spermatogonium → spermatocyte → spermatid → spermatozoon
Q19. Yolk (vitellogenin) accumulates in the oocyte during:✓ Its growth phase (vitellogenesis)
Q20. Inhibin, secreted by Sertoli cells, acts to:✓ Suppress FSH release from the pituitary