The Association of the British Pharmaceutical Industry
Abpi: Genes and Inheritance
A complete, student-paced lesson on genetics and inheritance. Students work their way through illustrations and animated tutorials, and answer review questions along the way. There is a self-checking quiz at the end of the lesson.
BBC
Bbc: Gcse Bitesize: Genetic Inheritance Aqa
This lesson focuses on genetic key terms; it defines them and explains what they do. It provides links to a video and a test.