Pre Male Reproductive Questions PDF

**Section I: Function of the Reproductive System** **1. What is the main purpose of gamete production in the reproductive system?**\ A) Regulate hormone secretion\ B) Produce new tissues\ C) Ensure species survival through reproduction\ D) Facilitate nutrient absorption\ E) Generate immune response...

**Section I: Function of the Reproductive System** **1. What is the main purpose of gamete production in the reproductive system?**\ A) Regulate hormone secretion\ B) Produce new tissues\ C) Ensure species survival through reproduction\ D) Facilitate nutrient absorption\ E) Generate immune responses\ **Correct Answer:** C **2. How does the male reproductive system support fertilization?**\ A) By producing oocytes for fertilization\ B) By enhancing nutrient exchange between gametes\ C) By nourishing sperm cells until they mature and depositing them in the female reproductive tract\ D) By producing hormones necessary for implantation\ E) By creating zygotes independently\ **Correct Answer:** C **3. What is the role of the female reproductive system in nurturing a new individual?**\ A) Providing hormonal support during development\ B) Supporting fertilization at the uterine tube\ C) Nurturing the individual in the uterus until birth and providing milk afterward\ D) Protecting gametes during meiosis\ E) Producing sperm for fertilization\ **Correct Answer:** C **4. Which of the following hormones is NOT produced by the reproductive system?**\ A) Testosterone\ B) Estrogen\ C) Progesterone\ D) Thyroxine\ E) Inhibin\ **Correct Answer:** D **Section II: Events of Meiosis** **5. What is the main event during Prophase I of meiosis?**\ A) Tetrads align at the metaphase plate\ B) Homologous chromosomes condense and crossing over occurs\ C) Sister chromatids separate and move to opposite poles\ D) Haploid cells are formed\ E) Chromosomes remain unpaired\ **Correct Answer:** B **6. What process occurs during Metaphase I of meiosis?**\ A) Chromosomes condense and form tetrads\ B) Tetrads align at the metaphase plate, with homologous chromosomes facing opposite poles\ C) Homologous chromosomes are pulled to opposite poles\ D) Sister chromatids separate\ E) Haploid cells are formed\ **Correct Answer:** B **7. During Anaphase I, what separates and moves to opposite poles?**\ A) Sister chromatids\ B) Homologous chromosomes\ C) Haploid cells\ D) Centrosomes\ E) Polar bodies\ **Correct Answer:** B **8. What is the result of Telophase I and cytokinesis in meiosis?**\ A) Four haploid cells\ B) Two haploid cells with sister chromatids\ C) Diploid cells with unpaired chromosomes\ D) Chromosome duplication\ E) Genetic material identical to the parent cell\ **Correct Answer:** B **9. How does Metaphase II differ from Metaphase I?**\ A) Homologous chromosomes line up in Metaphase II\ B) Chromosomes line up individually at the metaphase plate in Metaphase II\ C) Crossing over occurs during Metaphase II\ D) Sister chromatids are pulled apart during Metaphase II\ E) Metaphase II does not involve chromosomes aligning\ **Correct Answer:** B **Section III: Reduction Division and Chromosome Number** **10. Why is the reduction of diploid cells to haploid gametes essential?**\ A) To double the chromosome number in humans\ B) To prevent genetic variation\ C) To maintain the correct chromosome number across generations\ D) To produce homologous chromosomes\ E) To ensure mitotic cell division\ **Correct Answer:** C **11. What is the chromosome count in a diploid human cell?**\ A) 23\ B) 46\ C) 69\ D) 92\ E) 13\ **Correct Answer:** B **12. How many chromosomes are present in a haploid human gamete?**\ A) 23\ B) 46\ C) 69\ D) 92\ E) 13\ **Correct Answer:** A **13. Which structure is a pair of homologous chromosomes?**\ A) Sister chromatids\ B) Tetrads\ C) Centromeres\ D) Nucleosomes\ E) Haploid gametes\ **Correct Answer:** B **Section IV: Crossing Over and Genetic Diversity** **14. When does crossing over occur during meiosis?**\ A) Metaphase I\ B) Anaphase II\ C) Prophase I\ D) Telophase II\ E) Cytokinesis\ **Correct Answer:** C **15. What is the significance of crossing over?**\ A) Ensures identical daughter cells\ B) Reduces genetic diversity\ C) Introduces genetic variation\ D) Increases chromosome number\ E) Stops independent assortment\ **Correct Answer:** C **Section V: Sister Chromatids and Homologous Pairs** **16. What are sister chromatids?**\ A) Chromosome pairs from different parents\ B) Chromosomes that have undergone crossing over\ C) Identical copies of a single chromosome connected by a centromere\ D) Haploid gametes formed after meiosis II\ E) Non-identical chromosomes in a tetrad\ **Correct Answer:** C **17. Which of the following describes homologous pairs?**\ A) Chromosomes with identical alleles\ B) Chromosomes from one parent only\ C) Chromosomes with the same genes but different alleles\ D) Chromosomes undergoing independent assortment\ E) Chromosomes connected by a centromere\ **Correct Answer:** C **Section VI: Meiosis and Genetic Variation** **18. What is a key advantage of meiosis over mitosis?**\ A) Preservation of identical genetic material\ B) Creation of genetic variation\ C) Duplication of chromosomes without division\ D) Formation of four diploid cells\ E) Rapid cell replication\ **Correct Answer:** B **19. What process ensures genetic variation during meiosis?**\ A) DNA replication\ B) Tetrad formation in Metaphase II\ C) Crossing over and independent assortment\ D) Separation of sister chromatids in Anaphase I\ E) Formation of the zygote\ **Correct Answer:** C **Section VII: Importance of Meiosis in Humans** **20. Why is meiosis necessary for gamete production?**\ A) To create diploid zygotes\ B) To reduce genetic diversity\ C) To prevent chromosome number doubling during fertilization\ D) To ensure identical offspring\ E) To facilitate mitotic divisions\ **Correct Answer:** C **21. How does meiosis contribute to evolution?**\ A) By ensuring haploid zygote formation\ B) By reducing chromosome numbers\ C) By introducing genetic variation for natural selection\ D) By maintaining identical genetic material\ E) By suppressing mutations\ **Correct Answer:** C **Section VIII: Phases of Meiosis** **22. What distinguishes Anaphase I from Anaphase II?**\ A) Sister chromatids separate in Anaphase I\ B) Homologous chromosomes separate in Anaphase II\ C) Anaphase I separates homologous chromosomes, while Anaphase II separates sister chromatids\ D) Anaphase II is only present in mitosis\ E) Anaphase I occurs only in fertilization\ **Correct Answer:** C **23. What phase directly precedes the formation of four haploid gametes?**\ A) Anaphase I\ B) Telophase II\ C) Metaphase I\ D) Prophase II\ E) Cytokinesis I\ **Correct Answer:** B **Section IX: Miscellaneous** **24. What happens to homologous chromosomes during Metaphase I?**\ A) They align in pairs along the metaphase plate\ B) They separate and move to opposite poles\ C) They undergo crossing over\ D) They form a zygote\ E) They condense into sister chromatids\ **Correct Answer:** A **25. What is the ploidy of cells produced after Telophase I?**\ A) Diploid\ B) Haploid\ C) Tetraploid\ D) Aneuploid\ E) Polyploid\ **Correct Answer:** B **Section IX: Miscellaneous (Continued)** **26. What role does independent assortment play in meiosis?**\ A) Ensures chromosomes line up individually in Metaphase II\ B) Introduces genetic variation by randomly aligning homologous pairs during Metaphase I\ C) Separates sister chromatids during Anaphase II\ D) Duplicates chromosomes before division\ E) Maintains the diploid chromosome number in gametes\ **Correct Answer:** B **27. How many chromosomes are present in a human zygote?**\ A) 23\ B) 46\ C) 69\ D) 92\ E) 13\ **Correct Answer:** B **28. Which of the following occurs only in meiosis and not mitosis?**\ A) Separation of sister chromatids\ B) Crossing over between homologous chromosomes\ C) DNA replication\ D) Cytokinesis\ E) Formation of a cleavage furrow\ **Correct Answer:** B **29. Which structure is formed by homologous chromosomes during Prophase I?**\ A) Tetrad\ B) Sister chromatids\ C) Zygote\ D) Centromere\ E) Spindle fiber\ **Correct Answer:** A **30. What is the purpose of meiosis II in gamete formation?**\ A) To create diploid gametes\ B) To separate sister chromatids and produce haploid gametes\ C) To duplicate DNA for fertilization\ D) To reduce the chromosome number from diploid to haploid\ E) To align homologous chromosomes for pairing\ **Correct Answer:** B