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

  • When fertilization occurs, a male gamete fuses with a female gamete to form a zygote (unfertilized egg)
  • The zygote undergoes cell division by mitosis (reproduction of genetically identical cells)  This develops into an embryo – a ball of cells
  • Embryos contain chromosomes from  both parents, therefore receiving characteristics from both parents. Process of fertilisation is random, resulting in genetic variation
  • Gametes are haploid cells
  • Haploid cells contain 1/2 the number of chromosomes (23) instead of the full 46

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s