DNA

• What is the role of DNA?

  It carries genetic information and determines our inherited characteristics.
• What is meiosis?

  A form of cell division that produces four genetically different haploid cells known as gametes.
• How does meiosis differ from mitosis?

  Meiosis produces four genetically different cells with half the number of chromosomes as the parent cells.
• What does mitosis produce?

  Mitosis produces two genetically identical cells with the same number of chromosomes as the parent cells.
• What happens during meiosis II?

  Independent segregation of sister chromatids occurs, and each cell divides again, producing 4 haploid cells.
• What happens during meiosis I?

  Homologous chromosomes pair to form bivalents, crossing over occurs at chiasmata, and the cell divides into two.
• What occurs during crossing over in meiosis I?

  Exchange of sections of genetic material occurs at chiasmata.
• What happens to homologous chromosomes during meiosis I?

  They separate randomly, and each cell contains either a maternal or paternal copy.