Genetics

This unit covers the differences between sexual and asexual reproduction, the structure of DNA and its role in making proteins, mutations and their effects and how characteristics are inherited.

Mutations can cause a permanent change in the DNA of an organism. In the 19th century Gregor Mendel determined rules to explain genetic inheritance using pea plants.

Blood groups are an example of codominance. Selective breeding, cloning and genetic modification are techniques used to develop the yield of animal and plant crops.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.