In this video, Mr James Dundon from Anytime Education explains the difference between diploid and haploid cells. He starts with a brief description of homologous chromosomes and how genes code for proteins. He then uses the phenotype of eye colour to explain that humans are diploid creatures. He discriminates between diploid somatic cells and haploid sex cells. He finishes with a brief description of the importance of creating haploid cells by meiosis so the diploid number can be restored during fertilisation.