Biology un #flipclass Types of Selection #bioHWHL

Recording of an in-class quick lecture about the Types of Selection

Types of Selection Focus Questions
1) What is survival of the fittest? (1pt)
2) What are allele frequencies (again?) (2pts)
3) What will happen to the allele frequency for beneficial traits? (1pt)
4) What about for detrimental traits? (1pt)
5) What if the allele frequency for a trait that does no effect on fitness? (1pt)
6) What are the three types of selection?
7) What is a bell curve? Draw a sketch of a bell curve. (2pts)
8) What type(s) of traits would exhibit a range of phenotypes (which could be displayed on a bell curve)? (1pt) [HINT: Human height is a good example of this type of trait!]
9) Define Directional Selection. Draw the “bell curve” before and after for a trait that is under directional selection. (2pts)
10) Define Disruptive Selection. What is the other name for this type of selection? Draw the “bell curve” before and after for a trait that is under directional selection. (3pts)
11) Define Stabilizing Selection. (It is also called “Normalizing Selection.”) Draw the “bell curve” before and after for a trait that is under directional selection. (2pts)
12) What is genetic variation? (1pt)
13) What happens to genetic variation in each type of selection? (1pt)