1. By: Eric, Delaney, Micah & Shannon
Disruptive Selection
By: Eric, Delaney, Micah & Shannon

2. Definition-
Selection that favors two or more variations of a trait that differ from the current population average.

3. Sometimes called Diversifying selection
Sometimes called Diversifying selection. This type of selection favors both the extremes at the expense of the average. Before you have many animals whose phenotypes are in the middle (blended) but after time the animals on each pole have more numbers.

4. In disruptive selection the environment favors individuals that stray from the average trait. An environments conditions can favor more than one phenotype of this trait. The variations of the normal trait will be able to survive and reproduce, their population will increase. Meanwhile the average trait is not suited for this environment and so it can’t survive and reproduce as easily as the other traits can, it’s population will decrease.

5. There is the average trait and there are variations of this trait
There is the average trait and there are variations of this trait. The variations can survive in the environment better than the original trait because the environment favors their traits over the original and helps them hide from predators. As the variation of the traits thrive in the environment they reproduce and their population increases. The average trait population decreases because it is not suited for the environment.

6. Example #1
An example of this is rabbits. In this example the rabbits have either black and white fur co-dominant genes, black fur represented by “B��? and white fur represented by “b��?. A rabbit with the genotype of “BB��? Would have a phenotype of black fur, a genotype of “Bb��? Would have gray fur (a display of both black and white) and a genotype of “bb��? Would have a phenotype of white fur. If this population of rabbits were put into an area that had very dark black rocks as well as very white colored stone, the rabbits with black fur would be able to hide from predators amongst the black rocks and the white furred rabbits would be able to hide in the white rocks, but the gray furred rabbits would stand out in both of the habitats and thus would not survive.