Mbg 4020 Quizzes 1-4 Updated Questions And Correct Answers

MBG 4020 QUIZZES 1-4 UPDATED QUESTIONS AND
CORRECT ANSWERS
Question:
1. Inbreeding represents a ________________ in homozy-gosity
Answer:
increase

Question:
2. If you are going to allow a population of mice to ran-domly mate for 5 generations and you want to
con-strain 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 wor-ried 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 gen-eration. 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 dom-inant 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 domi-nant 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 pop-ulation size of 36 individuals, what is the level
of in-breeding after 9 generations (rounded to the nearest 0.001)?
Answer:
0.118

, Question:
8. How much is the frequency of the homozygous dom-inant 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 domi-nant 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 pop-ulation size of 43 individuals, what is the level
of in-breeding after 4 generations (rounded to the nearest 0.001)?
Answer:
0.046

Question:
10. How much is the frequency of the homozygous dom-inant 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 domi-nant 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 calcu-late inbreeding, we assume that all parents
make a/an ________________ contribution to the next generation
Answer:
equal

Question:
14. To reduce the level of inbreeding in a small population, we can impose a system of
_________________ mating
Answer:
planned

Question:
15. The effective population size can be altered with-out moving animals physically through the use
of _____________________