Duration: 01:19

By genetically modifying fish to produce omega 3, scientists may be able to promote health in humans and reduce over-fishing.

Duration: 01:27

A cell divides by mitosis - time lapse photography.

Duration: 02:24

An explanation of the process of cell division by mitosis and meiosis.

Duration: 04:36

Classification of plants continues to be very important. Scientists now use techniques including electron microscopy and DNA analysis. This is illustrated by the search for a plant with medicinal properties.

Duration: 3:04

How can using the DNA from endangered species prevent extinction? The construction of a DNA library from tissue samples.

Duration: 01:32

A report from a laboratory in which genetically modified plants are created.

Duration: 04:42

An introduction to DNA, the Human Genome Project and genetic screening for diseases.

Duration: 01:25

Scientists say it is only a matter of time before extinct animals such as the sabre-tooth tiger and the woolly mammoth can be resurrected.

Duration: 01:09

A description of Gregor Mendel's work with pea plants to demonstrate dominant and recessive inheritance.

Duration: 05:48

An interview with a scientist who worked on the Human Genome Project. The potential benefits in terms of developing preventive medicine are huge, but ethical issues are also raised.

Duration: 03:35

An explanation of the cause and effects of the genetic disorder cystic fibrosis and how it can be treated using gene therapy.

Duration: 06:16

A look at work to genetically modify rice plants, improving their ability to photosynthesise in hot, dry conditions.

Duration: 04:59

Liz Bonin from 'Bang Goes The Theory' discovers papaya plants on Hawaii have been genetically modified on two separate occasions to overcome diseases.

Duration: 01:46

Liz Bonnin from 'Bang Goes The Theory' gives a brief description of the process of genetic modification using genetically modified fruit as genes.

Duration: 01:49

Scientists have developed purple tomatoes by crossing genes with a snapdragon flower. The resulting GM fruit is thought to have anti-cancer properties.

Duration: 03:38

The story of twins separated at birth is used to explain clones and cloning, both natural and artificial.

Duration: 01:19

The combination of paired genes is used to explain inheritance of eye colour.

Duration: 04:28

An animated history of our understanding of inheritance from Aristotle to Watson and Crick.

Duration: 03:27

Students are used to model the process of DNA replication showing how nucleotides are lost during each replication.

Duration: 03:35

Liz Bonnin from 'Bang Goes The Theory' gives a detailed description of the differences between chromosomal and mitochondrial DNA in terms of inheritance.

Duration: 03:07

Liz Bonnin, Dallas Campbell and Jem Stansfield from 'Bang Goes The Theory' learn how their ancestors migrated from Africa. The specific paths of the migrations have been determined by using mitochondrial DNA.

Duration: 03:09

Liz Bonnin from 'Bang Goes The Theory' explains how tiny mutations in mitochondrial DNA have been used to track all humans alive today back to one common female ancestor named Mitochondrial Eve, who lived approximately 200,000 years ago in Africa.

Duration: 03:33

Through studying flower colour inheritance in snapdragons, Muriel Wheldale established that several genes interact to influence flower colour.

Duration: 03:41

An explanation of what mutations are and some of their causes. The effects that mutations can have are also discussed. Genetic diseases are investigated.

Duration: 05:28

Selective breeding of wheat in the 1950s produced plants which had a high yield and were strong enough to withstand adverse weather. This wheat is now grown globally and has reduced the incidence of famine.

Duration: 02:40

An explanation of how the sex chromosomes determine gender. An introduction to genes and chromosomes is given.

Duration: 04:50

What is stem cell research and how can stem cells be used in medicine? Ethical issues surrounding this topic are discussed.

Duration: 03:08

Dr Tom Vulliamy describes the role of telomeres in the aging process and how telomerase enzyme can prevent ageing in cells.

Duration: 01:32

The case is made for modifying the genomes of crop plants in order to improve yields and feed the growing world population.

Duration: 08:09

Barbara McClintock's breeding experiments on maize resulted in the theory of gene switches and gene interactions.

Duration: 04:52

Liz Bonnin from 'Bang Goes The Theory' talks to scientists who describe some of the ethics surrounding genetic modification. A balanced argument is presented with several scientists putting points for and against.

Duration: 04:52

Variation in the plant kingdom is used to introduce 19th century study of inheritance, including the work of Gregor Mendel.

Duration: 03:15

Nikolai Vavilov’s aim to cross different varieties of plants led him to establish the first seed bank. This method of storing genetic material is now internationally important.

Duration: 02:15

An animation and presenter narration shows haploid sex cells fusing and chromosomes pairing up.

Duration: 06:02

William Bateson demonstrated a common pattern to inheritance of phenotypic characteristics. All his breeding experiments produced a 3:1 ratio.