Explains what chromosomes are, their structure, their functions within a cell, and the health impact of mutations in a gene sequence.

Presents information about human chromosomes, their structure, and genetic disorders that can result from mutations.

Mutations can cause a permanent change in the DNA of an organism. Over many generations, organisms have adapted through mutation which involves small changes between organisms which may allow that organism to compete better for survival....

Given illustrations or partial DNA sequences, students will identify changes in DNA and the significance of these changes.

This detailed article from the Nobel e-Museum explores Thomas Hunt Morgan's career and research in genetics. Read how Morgan's work influenced later scientists and the modern scientific world.

An indepth introduction to genetics as a whole with sample lessons, vocabulary, and bibliography. From the Yale-New Haven Teachers Institute.

A complete, student-paced lesson on genetics and inheritance. Students work their way through illustrations and animated tutorials, and answer review questions along the way. There is a self-checking quiz at the end of the lesson.

This site explains genetic beliefs before and after Mendel, and also includes a section on Mendel himself and his experiments, entitled, "The Monk and his Peas".