Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is contained in the cell nucleus?
   • The nucleus of a Cell contains chromosomes made of DNA molecules
2. What is a chromosome made up of?
   • Each chromosome carries a large number of genes
3. How are chromosomes normally found in body cells?
   • In body Cells the chromosomes are normally found in pairs.
4. What is a cell cycle?
   • Where Cells divide in a series of stages
5. What happens during the cell cycle?
   • During the Cell cycle the genetic material is doubled and then divided into two identical Cells.
6. What must happen before a cell divides?
   • Before a Cell can divide it needs to grow and increase the number of sub-Cellular structures such as ribosomes and mitochondria. The DNA replicates to form two copies of each chromosome.
7. in mitosis what happens after DNA has been replicated?
   • In mitosis one set of chromosomes is pulled to each end of the Cell and the nucleus divides.
8. In mitosis how many cells are produced and how could you describe them?
   • Two - identical daughter Cells
9. What are the three main stages of a cell cycle during mitosis?
   • 1. Replication of DNA 2. DNA divides 3. Two Cells formed
10. Why is cell division by mitosis important in multicellular organisms?
    • For growth and development
11. A human cell has 46 pairs of choromsomes what stage of mitosis is in it?
    • First stage - replication of DNA (Prophase)