Meiosis: Extended
Extended Tier Only
- Meiosis is a type of nuclear division that gives rise to cells that are genetically different
- It is used to produce the gametes (sex cells)
- The number of chromosomes must be halved when the gametes (sex cells) are formed, it is therefore known as reduction division
- Halving the number of chromosomes ensures there is not double the number of chromosomes after gametes join at fertilisation
- The chromosome number is therefore halved from diploid to haploid,
- Meiosis results in four genetically different cells
The process of cell division by meiosis to produce haploid gamete cells
Differences between Mitosis & Meiosis
Examiner Tip
You do not need to know the stages involved in meiosis.
Questions on cell division often ask for differences between mitosis and meiosis. Learn two or three and remember to BE SPECIFIC when giving your answer.
You should also know the reasons for a specific type of cell division taking place and the types of cells where each happen.
