Explore the connection of genes and enzymes in regards to heredity and genetics. Concepts associated with dominant and recessive traits are also presented.

This interactive activity, adapted from the Dolan DNA Learning Center, illustrates how Gregor Mendel used purebred yellow and green peas to show that some genes are dominant and others are recessive.

This site from Palomar College provides a good background on exactly what Mendel did. Vocabulary links throughout make this a very good introduction article for genetics.

This personal site gives the seven characteristics that Mendel observed and a fairly large background to what Mendel saw and interpreted.

Explains two types of genetic cross - a reciprocal cross and a test cross. Examples are described for a monohybrid and a dihybrid test cross and for a reciprocal cross.

This lesson will give examples of disorders that are linked to genes on the X chromosome.

Historical perspective on Mendel's contribution. Spends a little time setting up what the current beliefs of Mendel's day were and how he changed things with what he did.