Animals|Base Sequence|Caenorhabditis elegans|Conserved Sequence|Databases, Genetic|Disease|Drosophila melanogaster|Evolution, Molecular|Gene Dosage|Gene Expression|Gene Expression Profiling|Gene Frequency|Genetic Predisposition to Disease|Humans|Mice|Oligonucleotide Array Sequence Analysis|Penetrance|Predictive Value of Tests|Saccharomyces cerevisiae|Sample Size|Species Specificity