Sometimes in olympiads you can confront with tricky polygenic inheritance problems. As I noticed, all you need to know in order to successfully solve polygenic inheritance problems is to be acquainted with probabilities and understand Pascal’s triangle shown below.
Then, I share a compiled pdf with some theory and problems concerning polygenic inheritance:
Also, some good exercises can be found HERE.
Finally, an amazing slideshow with practical examples:
Image source: https://www.freepik.com/vectors/genetic-engineering created by vectorjuice.