Question

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. genetic variation is similarities in the gene sequences of organisms within the same species. differences in traits between members of the same species can be due to environmental factors or inherited genetic variation. genetic variation can occur between individuals with the same parents. all humans are only 0.1% similar in their genetic makeup.

Explanation:

1. The text states trait differences in a species can come from environment or inherited genetic variation, confirming the second option is true.
2. The text notes siblings (same parents) have differing traits from genetic variation, so the third option is true.
3. Genetic variation is defined as DNA differences, not similarities, making the first option false.
4. The text specifies humans are 99.9% genetically similar (0.1% different), so the fourth option is false.

Answer:

• Correct statements:

1. Differences in traits between members of the same species can be due to environmental factors or inherited genetic variation.
2. Genetic variation can occur between individuals with the same parents.

• Incorrect statements:

1. Genetic variation is similarities in the gene sequences of organisms within the same species.
2. All humans are only 0.1% similar in their genetic makeup.