This addresses the understanding of genetic inheritance including simple Mendelian crosses where you will have the opportunity to demonstrate your understanding with illustrations and give a robust account of autosomal dominant recessive patterns and co–dominance. You will need to be able to draw and interpret a Punnett square and calculate probabilities for a variety of monohybrid or dihybrid crosses and recognise inheritance patterns. There will be an opportunity to research and understand the chromosomal basis of sex determination and explain the intra species variations as a result of features such as the environment.