CK-12 Foundation
Ck 12: Biology: Punnett Squares
[Free Registration/Login may be required to access all resource tools.] Describes how to use a Punnett square to predict genotypes and phenotypes.
CK-12 Foundation
Ck 12: Biology: Probability and Inheritance
[Free Registration/Login may be required to access all resource tools.] Discusses the role of probability in inheritance.