Here are some past essay questions:
Paul Andersen explains how Linked Genes behave using fruit flies in a 17m 22s tutorial.
The science of skin color – Angela Koine Flynn, a 5m vid from TED-Ed.
Breaking the illusion of skin color, a 15m TED-Ed video from Nina Jablonski
A short, simple explanation of Mendel’s work:
Mr Andersen talks you through Genetics:
And here Paul Andersen introduces A Beginner’s Guide to Punnett Squares in a 12m 15s tutorial. He also gives examples of monohybrid crosses and one example of a dihybrid cross (which we don’t need to know for SL).
An animated, narrated tutorial on Mendel’s experiments & genetic crosses from Sinauer Associates.
In Crash Course Biology #9 – Heredity, Hank and his brother John discuss heredity via the gross example of relative ear wax moistness.
Inheritance of blood types:
Here’s a nice little game: Thingdom from the Science Museum (thanks Tilly)