Which of the following would be an example of an extended phenotype? a. the vein patterns on the wings of a fruit fly. b. an increase in sexual activity due to infection with a sexually transmitted pathogen. c. the beak shape of a finch. d. the structure of the leg muscles of a cheetah. e. the pattern on a beaver’s tail.

b. An increase in sexual activity due to infection with a sexually transmitted pathogen.

Explanation:

The extended phenotype is a biological process. It includes the extended version of the gene function for the protein biosynthesis or in growth of the tissues to develop a particular phenotype or particular trait in the individual organism.

An increase in sexual activity is a example of extended phenotype. As it is an extended or over trait.