Question

At the end of last semester, your professor had a baby. In class, she notes that her baby weighed 7.2 lbs at birth. The other babies born in the hospital that week weighed 7.0 lbs, 6.8 lbs, 9.2 lbs, 7.5 lbs, and 7.3 lbs. What phenomenon does this pattern of birth weights represent?

Answer 1

Answer: Stabilizing selection  

Explanation:

It is a kind of natural selection through which population of the mean value stabilizes the non extreme and extreme values.

This is the most common action for natural selection because most of the trait do not change over a period of time.

The best example of this phenomenon is coats of species of mice in forest will be best for camouflage.

Another example is weight of human beings. In this case the average phenotype is selected above extreme phenotype.