Lesson Plan: B1.2.01

Hamble Lesson Observation Plan
Learning About
How do we replace old and damaged cells?
Keywords:
  • Multicellular: Organism made of more than one cell. (1)
  • Mitosis: Cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus. (1)
  • Cell Cycle: Growth and reproduction of cells consisting of different stages including interphase and mitosis. (1)
  • Chromosome: Long section of DNA containing many genes. (1)
Memory Anchor:
Method Precise Learning Objective Linked Question / Activity
(Designed for maximum working out)
Stepping Stones Pitstop Check
(Thinking Map)
The nucleus of a cell contains chromosomes made of DNA molecules. What is contained in the cell nucleus?

Each chromosome carries a large number of genes. What is a chromosome made up of?

In body cells the chromosomes are normally found in pairs. How are chromosomes normally found in body cells?

Quiz pupils about their knowledge of DNA and chromosomes, testing keywords. GF: question as to why chromosomes exist in pairs.

Cells divide in a series of stages called the cell cycle. What is a cell cycle?

Students should be able to describe the stages of the cell cycle, including mitosis.

During the cell cycle the genetic material is doubled and then divided into two identical cells. What happens during the cell cycle?

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. What must happen before a cell divides?

Flow diagram of the stages of the cell cycle describing the key points of each stage. Have flow diagram cycle round.

In mitosis one set of chromosomes is pulled to each end of the cell and the nucleus divides. in mitosis what happens after DNA has been replicated?

Finally the cytoplasm and cell membranes divide to form two identical cells. In mitosis how many cells are produced and how could you describe them?

Students need to understand the three overall stages of the cell cycle but do not need to know the different phases of the mitosis stage. What are the three main stages of a cell cycle during mitosis?

Cell division by mitosis is important in the growth and development of multicellular organisms. Why is cell division by mitosis important in multicellular organisms?

Students should be able to recognise and describe situations in given contexts where mitosis is occurring. A human cell has 46 pairs of choromsomes what stage of mitosis is in it?

Stretch: Describe/Draw annotate what happens to the replicated chromosomes during mitosis. Challenge: Explain how mitosis makes sure that the division results in two genetically identical daughter cells. GF: Explain why it is important that cell division is a very controlled process.

Links To the Big Ideas
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