Other
North Dakota State Univ.: Mendel's Law of Ind. Assort.
Mendel's second law and how he arrived at it through his experiments. Includes vocabulary and examples.
Other
Lawrence Livermore National Lab: Probabilities of Traits
This site explains how to determine the chances of inheriting certain traits from our parents. It gives mathematical examples and exercises.
University of Arizona
University of Arizona: Monohybrid Problem Set
This site, which is provided for by the University of Arizona, gives an interactive problem on blood type, which is an example of codominance. Links are provided to access the various subjects covered in this problem set.