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Despite having a wide variety of traits, all humans have nearly identical DNA. Some humans have more traits in common than others. But even closely related individuals, like siblings or a parent and their child, have traits, such as eye color or height, that can differ.

Differences in traits between members of the same species are sometimes attributable to the environment, but are often due to inherited differences in their DNA. Specific sections of DNA molecules, called genes, contain instructions for making a wide variety of proteins that determine traits and help the body function. Even though all humans are 99.9% similar in their genetic makeup, slight differences can result in distinct traits. These differences in DNA are called genetic

variation.

Select the true statements.