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This video describes how scientists silence different genes in regenerating planaria to study the process of regeneration at the molecular level.

This video provides an overview of the types of genes that, when mutated, can lead to the development of cancer.

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

This video shows real footage of somatic cell nuclear transfer (SCNT) being performed on eggs.

This animation gives an overview of how a fertilized human egg develops into an embryo.

This animation shows how stem cells from early mammalian embryos can be grown and studied in a laboratory.

This animation shows how zebrafish can rapidly heal wounds to the heart.

This animation shows how somatic cell nuclear transfer (SCNT) creates an embryo from an egg cell and a body cell.

This animation shows how salamanders can replace missing limb tissues with the help of cells similar to stem cells.

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.

This animation shows how recombination occurs between the X and Y chromosomes, then within the Y chromosome itself.