1. By the end of this lesson you will be able to …..
Define the terms diploid and haploid.
Give examples of diploid cells
Give examples of haploid cells
N5 only outcomes

2. Cells and Chromosomes Your body is made of trillions of cells
Body cells contain 2 sets of chromosomes (one from mum, one from dad)
These cells are known as diploid (di = two)

3. Gametes Gametes (sex cells) only contain one set of chromosomes
Gametes are known as haploid (ha = half) because they contain half the normal chromosome complement of the rest of your cells.

4. Cells and Chromosomes
Most body cells are diploid (di = two) and contain two sets of chromosomes.
Gametes are haploid (ha = half) and only contain one set of chromosomes.
N5 only.
Now that we know these definitions we need to update our definition of fertilisation ……

5. Fertilisation
Diagram as well please!
Egg cell (haploid)
Sperm cell (haploid)
Fertilisation
N5 only.
Zygote (diploid)
Fertilisation is the fusion of the nuclei of the two haploid gametes to produce a diploid zygote.