Question

a male cardinals red color is an example of a trait affected by natural selection. the females of the species choose mates based on the vibrant colors of the males feathers. if females begin using different criteria than feather color when they choose mates, what would most likely happen to the color of the male cardinals over time?
o increased variation in the shades of red because there is no advantage in one specific color
o increased variation in the shades of red because the cardinals try different ways to impress the females
o decreased variation in the shades of red over time because no form of the trait is advantageous
o decreased variation in the shades of red after a single generation

Explanation:

If female cardinals no longer choose mates based on male feather - color, the selective pressure for vibrant red feathers is removed. Without this selective pressure, there is no advantage to having a particular shade of red, so over time, the variation in the shades of red is likely to decrease as no form of the trait is advantageous in terms of mate - selection.

Answer:

decreased variation in the shades of red over time because no form of the trait is advantageous