| Front | Ova are mobile (can be moved) while sperm are motile (actively moves itself). Draw out the structures of an ovum and a sperm and label and briefly describe the organelles' functions |
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| Back | Ovum: Nucleus: haploid so contains 23 chromosomes Cytoplasm: allows reactions to take place Lysosomes in cytoplasm: trigger cortical reaction in fertilisation by releasing enzymes Lipid droplets: energy storage for a developing embryo Ovum membrane: fuses with the sperm in fertilisation Zona pellucida: thickens during cortical reaction Follicle cell layer: trigger acrosome reaction by releasing chemicals Sperm: Nucleus: haploid so contains 23 chromosomes Mitochondrion: provides energy for sperm to move Acrosome: lysosomes that releases enzymes to break down ovum's follicle cell layer and zona pellucida Flagellum (different to that of a bacterium): rotates to keep sperm motile |
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