BIO 181 Lecture 2.4

Lecture 2.4: Multiple Mendelian Traits


Knowing how to solve simple Mendelian genetics problems with a Punnett square is only the beginning. In fact, Mendel did not use Punnett squares. They are useful when first learning about Mendel’s results. But the time to learn more powerful techniques is upon us. Here we learn how to apply simple probability theory to solve essentially any Mendelian problem of any complexity.


  1. Download Lecture 2.4 slides.
  2. Do one of the following:
    1. In-person section: Attend Lecture 2.4
    2. Online section: Watch the following videos:
      1. Video 2.4.1, Introduction to Probability.
      2. Video 2.4.2, Solving Complex Mendelian Genetics Problems.
  3. Complete the questions on Study Guide 2.4.


After completing the activities, log into Canvas, launch BIO 181 and complete Lec 2.4 Quiz.

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