Answer the following analysis questions from the Meiosis Lab
(Studying Crossing-over during Meiosis in Sordaria)

• 1) List three major differences between the events of mitosis and meiosis.
  
• 2) How are meiosis I and meiosis II different?
  
• 3) How do oogenesis and spermatogenesis differ?
  
• 4) Why is meiosis important for sexual reproduction?
  
• 5) Can a haploid cell undergo meiosis? Why or why not? Can a haploid cell divide by mitosis?
  
• 6) How does crossing-over contribute to genetic variability within a population?
  
• 7) The number of map units between two genes or between a gene and the centromere is equal to the percentage of recombinants or crossing-over frequency. What value did you obtain for the distance between the spore color gene and centromere (or map units) from the Meiosis Lab?
  
• 8) What is the evolutionary significance of crossing-over? In other words, how does crossing-over help a population survive in a particular environment?