Lesson 4 - Lethal Alleles and Epistasis

In this lesson you will learn about

1. Watch this video to learn about lethal alleles. 

b) Watch this video to learn about polygenic inheritance and epistasis. 

2. a) Complete the practice questions about dihybrid crosses and epistasis

b) check your answers here

This PowerPoint outlines all the main points that you need to know from this lesson. You can use this PowerPoint as a review when you revisit this information at a later date.