Usage patterns
〈人〉の遺伝子を解析するto analyze someone's genes
The researchers analyzed the patient's genes.
遺伝子に異常があるthere is an abnormality in a gene
The test revealed an abnormality in the gene.
遺伝子を持つto carry a (particular) gene
He carries a gene that makes him prone to a certain illness.
遺伝子が働くa gene is expressed / functions
This gene is only expressed under certain conditions.