Final answer:
Genes are segments of DNA that contain instructions for building proteins or RNA molecules, influencing various traits. They play a fundamental role in determining an organism's characteristics.
Explanation:
Genes are segments of DNA that carry the code for specific proteins or RNA molecules. Each gene is responsible for encoding a particular polypeptide chain. While one gene can create one protein, sometimes multiple genes are needed for the expression of certain traits. Genes play a crucial role in determining an organism's characteristics and functions.
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