Lab 1: Hardy Weinberg Lab

Question 1

What are the 5 assumptions that need to be made about the population to assume that the original proportions of alleles will not change from one generation to the next?

Answer 1

1. No mutation occurs
2. No gene flow
3. Random Mating is Occurring
4. Population size is very large
5. No natural selection

Question 2

If allelic frequencies are not chancing then the population is said to be in what?

Answer 2

HW equilibrium

Question 3

What is the HW equation for Genotype Frequency and what do the variables represent?

Answer 3

p^2+2pq+q^2=1
p^2: frequency of the homo dominant genotype (FF)
q^2: frequency of the homo recessive genotype (ff)
2pq: the frecuente of the hetero genotype

Question 4

What is the HW equation for Allele Frequency and what do the variables represent?

Answer 4

p+q=1

p: dominant allele frequency
q: recessive allele frequency

Question 5

What are the steps to solving a HW equation?

Answer 5

1. determine q2 (#of homo recessive/ total #)
2. determine q (sq.rt q2)
3. determine p (1-q)
4. determine p2 and 2pq
5. check your answers

Question 6

when predation is random, how is the population affected?

Answer 6

random predation does not affect abundance

Question 7

how will specific predation affect abundance?

Answer 7

will decrease abundance of the specific abundance

Question 8

What are the 4 reasons allele frequency will change under random selection?

Answer 8

1. mutation occurs
2. e/immigration
3. random mutation
4. pop. size is small

Question 9

what process are you observing as the allele frequencies shift?

Answer 9

evolution

Question 10

What other types of selective pressures (aside from predation) might cause allele frequencies to shift in a population?

Answer 10

genetic drift due to natural disaster (bottle neck effect)