AQA GCSE Combined Science Trilogy · 8464
Specification 4.5.3.4, 4.6.1.1, 4.6.1.2 · Paper 2
Revise: Contraception MethodsIf sperm reaches the egg, fertilisation can occur: the nuclei of the two cells fuse. The fertilised egg divides to form an early embryo, which can become embedded in the lining of the uterus. This is implantation.
- Revise: Sexual and Asexual Reproduction
The fusion of the nuclei of male and female gametes.
- Revise: Meiosis
The fusion of male and female gamete nuclei, combining their chromosome sets to form a zygote.