There are several genes that control eye color; eye color is therefore called a (A) Polygenic trait.
Besides genes that directly control eye color, there are other genes that can affect the color of your eyes. For example, your eye color genes may code for green eyes, but if you have the gene for albinism (the absence of the pigment melanin), your eyes will be red. This is an example of (B)____ __________.
Pleiotropy
(B) gene-environment interaction.
To arrive at this answer, we can break down the information provided in the question. The question states that besides genes that directly control eye color, there are other genes that can affect the color of your eyes. It then gives an example where the presence of a specific gene (albinism) can alter eye color from green to red.
Based on this information, we can conclude that there is an interaction between the gene for albinism and the environment, resulting in the change in eye color. In this case, the absence of the pigment melanin (controlled by the gene for albinism) is interacting with the environment to cause the eyes to appear red.
Therefore, the correct term to describe this situation is gene-environment interaction.