Classroom Resources

This animation describes how skin color is generated by skin cells as protection against ultraviolet (UV) radiation.

This animation shows how disrupting cellular processes in the intestines can lead to colon cancer.

This animation shows a schematic representation of the mechanism of DNA replication.

This animation shows how one molecule of double-stranded DNA is copied into two molecules of double-stranded DNA.

This animation shows the process of DNA replication, including details about how the mechanism differs between the leading and lagging strand.

This animation shows how a tumor forms, recruits blood vessels, and enters metastasis.

This animation shows how meiosis, the form of cell division unique to egg and sperm production, can give rise to sperm that carry either an X or a Y chromosome.