Dna From the Beginning: Concept 4: Some Genes Are Dominant

This interactive activity, adapted from the Dolan DNA Learning Center, illustrates how Gregor Mendel used purebred yellow and green peas to show that some genes are dominant and others are recessive.

Many scientists have worked on discovering what genes are "turned on" within cells at different stages of development. DNA arrays and gene chips are techniques that have been developed. This article will help you understand these...

Dominate a lesson on genetic traits. Young scholars learn about the difference between dominant and recessive traits with an interactive lesson. An animation demonstrates Mendel's work on the inheritance of traits, and interactive...

At DNA from the Beginning, choose from classical genetics, molecules of genetics, genetic organization and control. Each concept is explained through animation, an image gallery, video interviews, biographies and links.

Thomas Hunt Morgan will explain the research he did to determine that some traits are linked to the sex of an individual.

A learning module focused on the concept of that each gene has two copies of it. Get an understanding of this concept with an animation, video, problems, and links.

A nice tutorial on DNA structure. The menu at the bottom allows you to view some different information.

Learn about the principle of dominance as you watch animations showing Mendel's experiments with pea plants. Find out what happened when he crossed plants that produced green seeds with those that produced yellow seeds.

Genes are actually a specific sequence of DNA and they have a clear start and stop. Learn about the discovery and sequencing of genes at this site. This multimedia article includes animations, pictures, video, biographical information,...

Alfred Sturtevant will describe his gene mapping research with fruit flies. This animated explanation will show how he bred fruit flies to determine the proximity of genes.