This month,two teams of European researchers said they identified new genetic markers linked to Alzheimer's disease.
VOA: special.2009.09.15
Just because you have one or twomarkers of genetic risk does not mean that you will definitely develop a particular condition, but the outcome can be affected by changes in lifestyle, or in some cases, by taking medication.
Then, when you mate two trees with different desirable properties, it is simple to check which offspring contain them all by looking for the geneticmarkers.