These are full comprehensive notes on the entire Module of Gene Expression for the AQA A-level specification. They are written using a mixture of my own research, class learning and the specification. They include diagrams, step by steps and everything I needed to get an A* in A-level Biology.

This is a full set of organised handwritten notes for Unit 7 - Genetics, Populations, Evolution and Ecosystems in the AQA A-Level Biology spec. Complete with information taken from the textbook as well as diagrams to aid understanding.

Gene expression described simply

Gene expressions

A detailed summary of the 3 types of selection including diagrams to illustrate the changes Definitions of variation and how evolution ties into variation

A concise, easy to understand explanation of speciation and genetic drift Contains key definitions you need to know for exam questions

A summary of 3.7.4 Ecosystems that includes definitions of all keywords such as niche, abiotic and competition all covered in one A3 spread Diagrams to show effects of predator and prey population sizes on each other Examples of abiotic and biotic factors and how they can change an ecosystem Definitions of the 3 types of adaptations and why they are needed

Detailed definitions of succession, both primary and secondary, with a diagram to show the progression Explanations on how each sampling method can be used and in which situations, crucial for exam questions

Summary of 3.8.4.3 Genetic Fingerprinting with details needed for required practical on DNA separation Complete overview of entire section on one A3 page spread Method to how gel electrophoresis is performed Details on how genetic fingerprinting is used for diagnosis, forensics and paternity tests

Summary of 3.8.2.3 Mutations, Gene Expression and Cancer with diagrams, details on how to interpret data based on previous exam questions, In depth explanation of all types of mutation with visual representations, Explanations on how mutations lead to tumours, Summary of how different levels of methylation change the expression of genes