6. As used in line 19, "sensitive" most nearly means

A. delicate.

B. responsive.

C. sympathetic.

D. vulnerable.

7. Based on the information in the passage, it can be reasonably inferred that which of the following statements is true?

A. Colorblindness can be corrected with treatments designed to encourage the growth of the missing genes that make pigments.

B. A person with normal color vision can become colorblind as he or she ages and the photosensitive cells degenerate.

C. A person who is colorblind will experience the visual world in a way that is much different from a person with normal color vision.

D. Colorblindness cannot be diagnosed without invasive and expensive genetic testing of both a person and his or her parents.

8. Which choice provides the best evidence for the answer to the previous question?

A. Lines 10-14 ("A red-green … him")

B. Lines 26-27 ("The blue cones … wavelengths")

C. Lines 42-44 ("the brain … absorbed")

D. Lines 72-75 ("By tracking … carriers")

9. As used in line 73, "affected" most nearly means

A. changed.

B. concerned.

C. exaggerated.

D. involved.

10. Based on the information in the passage and the graphic, which of the following statements is true?

A. A male with a colorblind mother and a father who is not colorblind has a 100% chance of being a carrier for the colorblind gene.

B. A male with a colorblind father and a mother who is a carrier has a 100% chance of being colorblind.

C. A female with a colorblind father and a mother who is not a carrier has a 100% chance of being a carrier for the colorblind gene.

D. A female with a mother who is a carrier but not colorblind and a colorblind father has a 100% chance of being colorblind.