This section will probably be more useful to breeders than to pet people !
Here you will find the genetic basics.
An easy explanation of how the color genetics work, about inbreeding, linebreeding, outcrossing and hybridation, with links to know a bit more about it.

Basic Terms
Coat colors
Inbreeding and Linebreeding

Here are a good number of links you may find interesting !

Very interesting websites with bibliographic informations about
all disorders inherited in most animal species.
http://morgan.angis.su.oz.au/Databases/BIRX/omia/

Cat genome project
http://rex.nci.nih.gov/lgd/cat/animod.htm

The basics
http://bowlingsite.mcf.com/Genetics/BasGen.html

Population genetics
http://bowlingsite.mcf.com/Genetics/PopGenI.html

Inbreeding and linebreeding
http://bowlingsite.mcf.com/Genetics/Inbreeding.html

The nature of genetic disease
http://www.netpets.org/cats/healthspa/gendis.html

Penetrance and expressivity
http://aussie-health.westga.edu/research/general/pen-express.html

Phenotypic versus Genotypic
http://aussie-health.westga.edu/research/general/hetero.html

Multiple Gene traits
http://aussie-health.westga.edu/research/general/multigenic.html

Genetic testing for breeders
http://www.netpets.org/cats/healthspa/dnatest.html

The value of population genetics to the breeder
http://www.netpets.org/cats/reference/genetics/popgen.html

Genetic diversity
http://www.lhasa-apso.org/health/divrsity.htm

Color genetics in cats
http://www.geocities.com/Heartland/Hollow/1991/genetic/

The genetics of immunity
http://usf.cattery.net/immungen.html

Heritability
http://www.workingdogs.com/doc0189.htm

Cat colors
http://www.fanciers.com/other-faqs/color-genetics.html

Archive of many interesting articles
http://www.messybeast.com/catarchive.htm