[Free Registration/Login may be required to access all resource tools.] The process of DNA replication is not always 100% accurate. Sometimes the wrong base is inserted in the new strand of DNA. This wrong base could become permanent. A...

This is a very informative site on DNA mutations. There is estensive information and helpful diagrams.

Good explanation of the different types of mutations. Solid background on base-pair substitution.

A good overview of mutation types, causes, and effects. Scroll down to the section on types of mutations for a good overview of frameshifts.

A good background on base pair mutations as a whole, with an example and explanation of what a silent mutation is.

Using a bead-bracelet simulation, construct a sequence of amino acids. Then, discover the effects of silent, point, and frameshift mutations.

[Free Registration/Login may be required to access all resource tools.] Summarizes the key points about adaptations, mutation, evolution, and natural selection. Includes a few questions to check for understanding.