was ist ein gen — what are common causes?

A gene is a segment of DNA that contains the instructions for making a protein or functional RNA. Genes determine many traits and influence susceptibility to certain diseases. Common causes of genetic variation include single nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variants. These variants can be inherited or arise spontaneously (de novo). Environmental factors like radiation or chemicals can cause mutations, but most variations are harmless. In MyBody-X tests, typical SNPs in genes like COMT, MTHFR, or FUT2 are analyzed – but their effects are usually small and not diagnostic. A DNA test shows predispositions, not diagnoses. For symptoms like stress or fatigue, blood and nutrient tests are often more actionable.