DNA from the beginning. A basic primer on genetics and molecular biology

Plant Genome Database Tutorial. From USDA, just what it says

TIGR.  That's pronounced "tiger"--The Institute for Genomic Research--base home for significant genomic and bioinformatics research.

NCBI Education.  Tutorials on genomics and bioinformatics from the National Center for Biological Information.

AgBiotech and Food Glossary.

Genomic Glossaries   Lots and lots of basic information on all aspects of "-omics"

What's news in the science of biology...

Science.  The magazine.

The Scientist.  The magazine.