MBG 4020 QUIZZES 1-4 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
Question:
1. Inbreeding represents a ________________ in homozygosity
Answer:
increase
Question:
2. If you are going to allow a population of mice to randomly mate for 5 generations and you want to
constrain inbreeding to 14.678481% after generation 5, how many males do you need if you have 20
females?
Answer:
5
Question:
3. If the effective population size is 60 individuals and there are 60 females in the population, how many
males are there?
Answer:
20
Question:
4. If the effective population size is 64 individuals and there are 80 females in the population, how many
males are there?
Answer:
20
Question:
5. Suppose as a breeder of Norfolk terriers, you are worried about the rate of inbreeding since the breed is
small in number. You want to make sure the rate of inbreeding in your kennel stays below 6.25% per
generation. If you have 10 females in your kennel, how few males can you get away with.
Answer:
3
Question:
6. How much is the frequency of the homozygous dominant genotype increased in a population where f(A)
= 0.26 and there are 40 individuals randomly mating (round to the nearest 0.0001)?
Answer:
0.0024
The homozygous dominant genotype increases in frequency in proportion to the allele frequencies and
inversely proportional to the population size.
, Question:
7. If you observe a population to have an effective population size of 36 individuals, what is the level of
inbreeding after 9 generations (rounded to the nearest
0.001)?
Answer:
0.118
Question:
8. How much is the frequency of the homozygous dominant genotype increased in a population where f(A)
= 0.44 and there are 20 individuals randomly mating (round to the nearest 0.0001)?
Answer:
0.0062
The homozygous dominant genotype increases in frequency in proportion to the allele frequencies and
inversely proportional to the population size.
Question:
9. If you observe a population to have an effective population size of 43 individuals, what is the level of
inbreeding after 4 generations (rounded to the nearest
0.001)?
Answer:
0.046
Question:
10. How much is the frequency of the homozygous dominant genotype increased in a population where
f(A) = 0.21 and there are 60 individuals randomly mating (round to the nearest 0.0001)?
Answer:
0.0014
The homozygous dominant genotype increases in frequency in proportion to the allele frequencies and
inversely proportional to the population size.
Question:
11. The effective population size calculation assumes that mates are chosen __________
Answer:
randomly
Question:
12. The effective population size calculation also assumes that matings are __________ and remain that
way for life
Answer:
pairwise
Question:
13. When we use the (effective) population size to calculate inbreeding, we assume that all parents make
a/an ________________ contribution to the next generation
Answer:
equal
AND CORRECT ANSWERS
Question:
1. Inbreeding represents a ________________ in homozygosity
Answer:
increase
Question:
2. If you are going to allow a population of mice to randomly mate for 5 generations and you want to
constrain inbreeding to 14.678481% after generation 5, how many males do you need if you have 20
females?
Answer:
5
Question:
3. If the effective population size is 60 individuals and there are 60 females in the population, how many
males are there?
Answer:
20
Question:
4. If the effective population size is 64 individuals and there are 80 females in the population, how many
males are there?
Answer:
20
Question:
5. Suppose as a breeder of Norfolk terriers, you are worried about the rate of inbreeding since the breed is
small in number. You want to make sure the rate of inbreeding in your kennel stays below 6.25% per
generation. If you have 10 females in your kennel, how few males can you get away with.
Answer:
3
Question:
6. How much is the frequency of the homozygous dominant genotype increased in a population where f(A)
= 0.26 and there are 40 individuals randomly mating (round to the nearest 0.0001)?
Answer:
0.0024
The homozygous dominant genotype increases in frequency in proportion to the allele frequencies and
inversely proportional to the population size.
, Question:
7. If you observe a population to have an effective population size of 36 individuals, what is the level of
inbreeding after 9 generations (rounded to the nearest
0.001)?
Answer:
0.118
Question:
8. How much is the frequency of the homozygous dominant genotype increased in a population where f(A)
= 0.44 and there are 20 individuals randomly mating (round to the nearest 0.0001)?
Answer:
0.0062
The homozygous dominant genotype increases in frequency in proportion to the allele frequencies and
inversely proportional to the population size.
Question:
9. If you observe a population to have an effective population size of 43 individuals, what is the level of
inbreeding after 4 generations (rounded to the nearest
0.001)?
Answer:
0.046
Question:
10. How much is the frequency of the homozygous dominant genotype increased in a population where
f(A) = 0.21 and there are 60 individuals randomly mating (round to the nearest 0.0001)?
Answer:
0.0014
The homozygous dominant genotype increases in frequency in proportion to the allele frequencies and
inversely proportional to the population size.
Question:
11. The effective population size calculation assumes that mates are chosen __________
Answer:
randomly
Question:
12. The effective population size calculation also assumes that matings are __________ and remain that
way for life
Answer:
pairwise
Question:
13. When we use the (effective) population size to calculate inbreeding, we assume that all parents make
a/an ________________ contribution to the next generation
Answer:
equal
