variation

• What type of cells does meiosis produce?


  Non-identical cells
• What type of cells does mitosis produce?


  Identical cells
• What is the role of gametes in sexual reproduction and examples?

  • Joining (fusion) of male and female gametes
  • Sperm and egg cells in animals
  • Pollen and egg cells in flowering plants
• What is the result of mixing genetic information in sexual reproduction?


  It leads to variety in the offspring
• What process is involved in the formation of gametes?


  Meiosis
• What characterizes asexual reproduction?


  • Involves only one parent
  • No fusion of gametes
  • No mixing of genetic information
  • Leads to genetically identical offspring (clones)
  • Only mitosis is involved
• What process halves the number of chromosomes in gametes?


  Meiosis
• Where do cells divide by meiosis to form gametes?


  In reproductive organs
• What happens when a cell divides by meiosis?

  • Copies of genetic information are made
  • The cell divides twice to form four gametes
  • Each gamete has a single set of chromosomes
  • All gametes are genetically different from each other
• What is unique about the genetic composition of gametes?


  All gametes are genetically different from each other
• What occurs at fertilization regarding gametes?


  Gametes join to restore the normal number of chromosomes
• What happens to the new cell formed after fertilization?

  It divides by mitosis
• What is the result of the new cell dividing by mitosis?


  The number of cells increases
• What restores the full number of chromosomes after meiosis?


  Fertilisation
• What occurs after an embryo develops?


  Cells differentiate
• 3 differences between the processes of mitosis and meiosis?

  • Mitosis produces 2 cells, meiosis produces 4 cells
  • Mitosis produces genetically identical ones, meiosis produces genetically different ones
  • 1 cell division in Mitosis, 2 in meiosis
• Similarity between mitosis and meiosis?

  DNA doubles
• what characterizes sexual reproduction?

  • two parents
  • fusion of gametes
  • mixing of genetic info
  • genetically different offspring
  • meiosis involved in production of gametes