Aiming for Grade 4 LOs:

• State that gametes (sex cells) are formed by meiosis.
• State that meiosis halves the number of chromosomes in gametes and fertilisation restores the full number.
• Solve simple probability questions.

Aiming for Grade 6 LOs:

• Describe the processes of meiosis and mitosis.
• Explain how meiosis halves the number of chromosomes in gametes and fertilisation restores the full number.
• Solve simple probability questions.

Aiming for Grade 8 LOs:

• Compare and contrast mitosis and meiosis.
• Explain in detail why gametes are all genetically different to each other.
• Solve complex calculations to determine the number of possible gametes formed during meiosis.