3.3 – Meiosis

1.The micrographs show four different phases from meiosis II. What is the correct order?  





2. During which phase of the first division of meiosis can non-disjunction take place and what structure is affected by the non-disjunction?





3. During which phase of the first division of meiosis can non-disjunction take place and what structure is affected by the non-disjunction? What is the reason that cladograms based on DNA sequences are more reliable predictors of the phylogenetic relationship of species than cladograms based on protein sequences?





4. Which is a characteristic of the pairs of sister chromatids that are visible during meiosis?





5. The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive system. The graph shows the percentage of samples in which this bacterium showed resistance to six antibiotics over a period of ten years. What is a possible explanation for the total percentage resistance being larger than 100% in 2010?





6. What description is matched with the correct phase in meiosis I?





7. What event occurs only in meiosis?





8. What is the chromosome number in a human gamete with non-disjunction?





9. What is the chromosome number in a human gamete with non-disjunction?





10. A body cell of a goat has 60 chromosomes. What would be produced following meiosis in the testis of a male goat?





11. Which of the following involves meiosis?





12. What stage of meiosis is shown in the micrograph?





13. If there are 16 chromosomes in a cell that is about to divide, what will be the number of chromosomes in a daughter cell after division by mitosis or meiosis?





14. What is meiosis?





15. What causes genetic variety in the formation of gametes during meiosis?





16. Which of the following statements relate(s) to Down syndrome (trisomy 21)? I.   It can be detected in chorionic villus samples. II.  It results from non-disjunction in meiosis. III. It is caused by gene mutation.





17. Which of the following statements about homologous chromosomes is correct?





18. In the following diagram, which pair represents homologous chromosomes?  





19. During reproduction in flowering plants an embryo sac is produced, containing one haploid nucleus. This haploid nucleus divides by mitosis three times. What is produced?





20. Which phase of cell division is photographed in order to make a karyotype?





21. If the haploid number of a species is 14, how many chromatids will there be in metaphase I in a dividing diploid cell?





22 What do all human males inherit from their mother? I.  An X chromosome II. A Y chromosome III. Mitochondrial DNA





23. What procedure(s) could have been involved in the creation of the karyotype? I.   Chorionic villus sampling II.  DNA profiling III. Amniocentesis





24. What can be concluded from the karyotype provided?







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