Question

Which of the following scenarios refutes the argument that genes are entirely internally influenced?

A. Patrick possesses a gene for brown hair, but his children have blond hair.
B. Cindy possesses a gene for freckles, but she uses makeup to cover them up.
C. Margaret possesses a gene for melanoma, so she chooses to stay out of the
sun.
D. Charles possesses a gene for Alzheimer's, but he has not yet experienced
symptoms.

Answer 1

The actual answer is C.

Step-by-step explanation:

From Odyssey: "There are internal and external environmental influences regarding if and how genes are expressed. For an internal example, have you ever noticed that most male birds are more brightly colored than female birds? This is because chemicals only in the males control whether the gene for bright colors is expressed. An example of an external influence is a person who stays out of the sun because they know that they are at risk for developing a deadly type of skin cancer, and their behavior may keep them from getting the cancer."

Answer 2

your answer would be A