1. What does it mean for a trait to be inherited? A. The trait is present and is passed from sibling to sibling. B. The trait is heavily influenced by the environment. C. The trait is passed from parents to offspring. D. The trait is present in all the members of a population.

The question is asking for the definition of an inherited trait. Inherited traits are those that are passed down from parents to their offspring through genes. These traits are present in the offspring because they were present in one or both of the parents. The options provided are:<br /><br />A. The trait is present and is passed from sibling to sibling.<br />B. The trait is heavily influenced by the environment.<br />C. The trait is passed from parents to offspring.<br />D. The trait is present in all the members of a population.<br /><br />Option A is incorrect because inherited traits are passed from parents to offspring, not siblings to siblings. Option B is incorrect because while the environment can influence the expression of traits, it does not determine whether a trait is inherited. Option D is incorrect because being present in all members of a population does not necessarily mean a trait is inherited; it could simply be a common trait in the population. Therefore, the correct answer is Option C, as it accurately describes what it means for a trait to be inherited: it is passed from parents to offspring.