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[DrNick]

To put it simply- Usually offspring will receive two alleles (or more) for specific traits from their parents (ie one set of genes from each), and yes it is much more complex than this..

If dominant then that gene will be expressed over the recessive gene from the other parent.

If co-dominant then both genes will be expressed (ie a mix of both)

If recessive then the trait will only be expressed if that recessive trait is recleived from both parents, that is why some people carry genes for diseases that they do not show signs/symptoms of BUT if they have offspring with people who also carry that recessive gene then their kids MAY have the signs/symptoms/display that disease/syndrome. I think albino's are like this.

I am slightly, well very to be truthful, drunk at this point so my facts may be slightly skewed... it has been ages since I studied genetics and it is MUCH more complex than my description..