p53 gene

How and Why Genes Are Regulated?

What does it mean to say that genes are turned on or off?

The Regulation of DNA Packing

The Initiation of Transcription

RNA Processing and Breakdown

Gene regulation affects two important processes

The Genetic Potential of Cells

Plant cloning

Reproductive Cloning of Animals

Reproductive Cloning

Practical Applications of Reproductive Cloning

Why is reproductive cloning used?

Conservationists argue that cloning

Practically, cloning of mammals is extremely difficult and
inefficient.

Embryonic Stem Cells

The Genetic Basis of Cancer

Viruses that cause cancer can become permanent
residents in host cells by

• A gene that causes cancer is called an

A normal gene with the potential to become an oncogene
is called a

• A cell can acquire an oncogene from

Tumor-Suppressor Genes

The Process of Science:
Are Childhood Tumors Different?

The Progression of a Cancer

Inherited Cancer

Most cancers arise from

The Evolution of Cancer in the Body