Gametogenesis and fertilization
Anatomy · Topic 77
Source: NMC CBME Curriculum 2024 · Volume I · Anatomy · Topic 77 · combined PDF page 146
Practice questions
- A single primary spermatocyte completes both meiotic divisions. What is the usual cellular outcome?
- Immediately after completion of meiosis I, a human male germ cell is best described as which of the following?
- Which process converts a haploid spermatid into a morphologically differentiated spermatozoon without another cell division?
- During normal sperm nuclear remodeling, which change is characteristic of spermiogenesis?
- A spermatozoon has left the testis but has not yet completed epididymal transit. Which statement best describes its functional status?
- A primary oocyte remains arrested for years before resuming meiosis in a reproductive cycle. In which meiotic stage is it arrested?
- At ovulation, the human oocyte is ordinarily arrested at which stage?
- What event normally triggers completion of meiosis II in the human secondary oocyte?
- Why does oogenesis produce one large functional gamete rather than four similarly sized gametes?
- Which statement about polar bodies is correct?
- In a typical human reproductive tract, where does fertilization most commonly occur?
- A spermatozoon enters the female reproductive tract and subsequently gains the ability to fertilize an oocyte. What is this functional change called?
- The acrosome reaction is most directly associated with which fertilization function?
- In mammals, what is the principal consequence of the oocyte cortical reaction after sperm-oocyte fusion?
- A fertilized oocyte contains more than one sperm-derived haploid genome. Which developmental problem does this most directly represent?
- Which sequence best represents the central cellular events of mammalian fertilization?
- What is the usual chromosome contribution of a normal human spermatozoon at fertilization?
- A normal human ovum is fertilized by a sperm carrying a Y chromosome. Which conclusion is correct regarding chromosomal sex at fertilization?
- Which structure of a spermatozoon is principally responsible for propulsion through fluid?
- A researcher observes extensive remodeling of chromatin in elongating spermatids. Which interpretation is most appropriate?
- A fertilized secondary oocyte extrudes a small cell after sperm entry. Which event does this most directly indicate?
- Which statement best describes the maternal contribution to mitochondrial inheritance in mammals?
- Which event occurs during meiosis I in both male and female gametogenesis and contributes to genetic variation?
- A gamete carries one chromosome from each homologous pair. Which term describes this chromosome complement?
- Which statement correctly distinguishes meiosis from spermiogenesis?
- A spermatozoon has successfully penetrated the zona pellucida but has not fused with the oocyte membrane. Which statement is most accurate?
- A defect impairs ubiquitin-proteasome activity during oocyte maturation. Which broad process is most plausibly affected based on its regulatory role in oocyte meiosis?
- A man has a defect in protamine incorporation during sperm development. Which sperm property is most directly expected to be abnormal?
- Which change is expected when maternal and paternal haploid chromosome sets are brought together at normal fertilization?
- A sperm is exposed to the female reproductive tract but fails to undergo the functional changes needed for fertilization. Which process is most directly defective?
- Which pairing of process and cell type is correct?