I'm finding it really difficult to understand does anyone have any good resources or what's the best way to understand it? Thanks and does it come up often on the exam?
Genetic crosses come up every year, Evolution every second year and DNA RNA comes up almost every year so it is a very important chapter. I guess you're gonna have to spend some time on it..
What really helps me understand Biology is to first do a bit of watching videos and reading outside the course. Try this playlist: https://www.youtube.com/watch?v=CBezq1fFUEA&list=PLsnXnKUonnw5nYR2BRQpOOQh6xE6OJDnD