This map from Access Excellence shows human chromosome pairs. The site includes a short description of chromosome structure, staining of chromosomes and karyotypes.

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.

Access Excellence provides an interesting graphic which shows the helical structure of DNA from the molecular to chromosomal scale.

A brief text overview of DNA structure and an introduction or mention of the various forms of DNA.

Discover the cutting edge research going on with telomeres. Find out what they are, how they replicate and their role in the aging process.

[Free Registration/Login may be required to access all resource tools.] Covers the structure and function of the nucleus.

Discussion in detail of the structure and function of the nucleus and ribosomes of a cell and how they work together in the production of proteins.

This site provides simple diagrams on all major topics in cell biology, genetics and biotechnology.

[Free Registration/Login may be required to access all resource tools.] Covers the structure and function of the nucleus. Students will learn about the structures associated with the nucleus like the nuclear envelop, the nucleolus,...

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.

This interactive lab will enhance learning about DNA by virtually translating a gene.

College-level course focusing on the principles of genetics. Course topics include structure and function of genes, chromosomes and genomes, biological variation, population genetics, use of genetic methods to analyze protein function,...

This lesson focuses on DNA including it's structure,components,and how it goes together to form genomes. It also provides to links to a video and a test.

Explains how DNA contains genetic material and how it is housed in chromosomes. This lesson is 2 of 5 in the series titled "DNA."

Explains how DNA contains genetic material and how it is housed in chromosomes. This lesson is 1 of 5 in the series titled "DNA."

Explains how DNA contains genetic material and how it is housed in chromosomes. This lesson is 4 of 5 in the series titled "DNA."

[Free Registration/Login may be required to access all resource tools.] The nucleus is only found in eukaryotic cells. It contains most of the genetic material of the cell. It is surrounded by a double membrane, or nuclear envelope, that...

This video explains how DNA works and what it does, relating it to an instruction manual for building an organism. [4:29] Followed by a short quiz and a list of additional resources to explore.

Brief description of all the organelles.

In this activity, middle schoolers make microscopic observations of onion root tips, discuss them with classmates, then make detailed drawings that are shared.