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

This animation describes a genetic engineering technique called DNA cloning, which can be used to make bacteria express a foreign gene, typically from another species.

This animation shows how mutations can arise when DNA is damaged.

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 one molecule of double-stranded DNA is copied into two molecules of double-stranded DNA.

This animation shows the transcription of DNA into RNA.

This animation shows how RNA polymerase and other transcription factors interact to transcribe DNA into RNA.

This animation describes the four bases that make up DNA.

This animation shows how DNA molecules are packed up into chromosomes.

This animation describes the typical ratios of bases in DNA.

This animation shows how mistakes made during DNA replication are repaired by the cell.

This animation describes the set of chromosomes usually found in humans.