3.2 understand that fertilisation involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo

3.2 •1.sexual reproduction is genetic information from a father and a mother 

       2.in sexual reproduction, the mother and father produce gametes (sperm and egg cells)

       3.gametes are haploid (they have half the number of chromosomes in a normal cell (23))

       4.at fertilisation, a male gamete fuses with a female to form zygote (fertilised egg)

                    •the zygote ends up with the full set of chromosomes

       5.the zygote then undergoes cell division by mitosis and develops into an embryo 

       6.the embryo inherits features form both parents, receiving  chromosomes from both parents

       7.the fertilisation of gametes is random - this produces genetic variety in the offspring