Genetic Drift

Question 1

Effective Population Size (Ne ‘lowercase e’)
a. Number of individuals in an ideal __ (in which all adults produce equal number of gametes) that produces the rate of genetic __ in the real population

Answer 1

a. population, drift

Question 2

e stands for __

Answer 2

effective

Question 3

Reproductive skew: Not all __ contribute equally to the next generation
EX. elephant seals

Answer 3

adults

Question 4

Influences on Effective Population Size:

a. ___ in number of progeny
b. Sex __
c. Natural Selection
d. Cross- __ inbreeding
e. Fluctuations in ___ size

Answer 4

a. Variation
b. ratio
d. generational
e. population

Question 5

It is important to note that all populations are __ in size (violation of HW assumption)
a. Therefore, genetic drift occurs to some ___ in all populations

Answer 5

finite

a. degree

Question 6

Genetic Drift : random changes in the allele’s __ in a population due to __ sampling error
a. Strongest in __ populations

Answer 6

frequencies, random

a. smallest

Question 7

Sources of Genetic Drift includes:

a. Founder __
b. Bottle __

Answer 7

a. effect

b. Bottlenecks

Question 8

Even in large (infinite populations) a new mutation is present in only a few copies and is therefore likely to be __ by chance

Answer 8

lost

Question 9

Frequency of a newly arisen allele= pt= 1/2N

Answer 9

pt=1/2N

Question 10

Heterozygosity ___ as the frequency of one allele approaches __

Answer 10

decreases, 1