Lecture 20 C

Question 1

balancing selection can result in

Answer 1

heterozygote advantage (heterozygote has higher fitness)

Question 2

directional selection

Answer 2

one tail of distribution is selected for

Question 3

true or false: in directional selection the population mean stays the same

Answer 3

false

Question 4

in directional selection, does genetic diversity reduce or increase

Answer 4

reduces(due to fixed or lost alleles)

Question 5

stabilizing selection reduces

Answer 5

the amount of variation in a trait

Question 6

stabilizing selection only applies to what type of traits?

Answer 6

polygenic traits

Question 7

in stabilizing selection does genetic variation reduce or increase?

Answer 7

reduces (allele corresponding to extreme phenotypes are lost)

Question 8

disruptive selection maintains

Answer 8

the levels of genetic variation in a trait

Question 9

what type of phenotypes does disruptive selection favor

Answer 9

extreme phenotypes

Question 10

does the mean in disruptive selection change or stay the same

Answer 10

stays the same yasss

Question 11

in disruptive selection, is genetic variation maintained?.

Answer 11

yeah it is