is melanin a single gene
â¢ Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. â¢ Today, scientists have discovered that at least eight genes influence the final color of eyes.The genes control the amount of melanin inside specialized cells of the iris. Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. â¢ Today, scientists have discovered that at least eight genes influence the final color of eyes.