Answer: The correct answer is-purple flower color in pea plants.
Sex linked trait is a characteristic present in an organism whose genes are present on the sex chromosome. In the given question, eye color in fruit flies, red-green color blindness in humans, and hemophilia are sex linked recessive genetic traits as their genes are carried on sex chromosome.
On the contrary, gene for purple flower color in pea plants is not carried by sex chromosome. Therefore, it is not a sex linked trait.