Describe the relationships among genes, DNA, and traits.

Traits determine the DNA in genes.

Traits are made of genes, which are composed of DNA.

Traits are determined by genes, which are composed of DNA.

Genes code for traits, which are composed of DNA.

All of the statements are correct. Genes are segments of DNA that serve as the basic units of heredity. They contain the instructions for building and functioning of various molecules in the body, including proteins. These genes code for specific traits, such as eye color, height, or hair texture. Traits, therefore, are determined by the genes we inherit from our parents and are composed of DNA molecules.