Download Chap 23 test-retake

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Microevolution wikipedia, lookup

Dominance (genetics) wikipedia, lookup

Inbreeding avoidance wikipedia, lookup

Population genetics wikipedia, lookup

Human genetic variation wikipedia, lookup

Hardy–Weinberg principle wikipedia, lookup

Inbreeding wikipedia, lookup

Genetic drift wikipedia, lookup

Polymorphism (biology) wikipedia, lookup

Koinophilia wikipedia, lookup

Chapter 23 Quiz-Retake
38 points total
Fill in the blank with the best answer: Each is worth 2 points (10 Total)
1) _______________ is the accumulation of heritable changes within populations over
2) The physical expression of a trait (e.g., height or eye color) describes an organism’s
3) ___________ occurs when different phenotypes of the same species survive and
reproduce at different frequencies because some are better adapted to a particular
environment .
4) A population that is not changing (i.e., it has constant genotype and allele frequencies
5) _________ selection occurs when one extreme of a population contributes more
offspring to the next generation than average members of the population do.
Multiple Choice: Circle the best possible answer Each is worth 2 points (12 total)
6. Assume that a population is in Hardy–Weinberg equilibrium for a trait controlled by
one locus and two alleles. If the frequency of the recessive allele is 0.55, what is the
frequency of the dominant allele?
a. 0.50
b. 0.45
c. 0.81
d. 0.19
7. There is a gene that causes people to have crumbly earwax. This gene is expressed as a
complete dominant: Individuals who are homozygous dominants (CC) or heterozygous
(Cc) have crumbly earwax. Homozygous recessives (cc) have gooey earwax. On Paradise
Island there are 100 people, 75 of whom have crumbly earwax. Assuming Hardy–
Weinberg conditions, what is the frequency of the c allele on Paradise Island?
a. 0.25
b. 0.50
c. 0.87
d. None of the above
e. This cannot be answered without more information.
8. Which of the following agents of evolution adapts a population to its environment?
a. Nonrandom mating
b. Natural selection
c. Migration
d. Genetic drift
e. Mutation
9) In the Hardy–Weinberg equation, the heterozygous individuals in a population are
represented by
a. p2.
b. 2pq.
c. q2.
d. p.
e. q.
10. Which of the following populations would demonstrate a population bottleneck?
a. The population of El Paso, Texas, after it has moved in its entirety to Patagonia
b. Eight male and eight female elephant seals that have survived the wreck of the Exxon
c. A million male orangutans
d. Six male orangutans collected from a natural population in Sumatra and moved to the
San Diego Zoo
e. None of the above
12. In the Hardy–Weinberg equation, the homozygous recessive individuals in a
population are represented by
a. p2.
b. 2pq.
c. q2.
d. p.
e. q.
Problems: Each is worth 4 points (16 points total). CIRCLE YOUR FINAL
13. The allele for attached earlobes is recessive to the allele for unattached earlobes. In a
poplulation of 1000 people, 750 show the dominant phenotype. What is the frequency of
the recessive allele in this population?
14. Mating behavior in honeybees is a simple dominant, recessive situation. In a
population of 600 honeybees, 504 show the dominant phenotype for mating behavior.
How many show the recessive phenotype of mating behavior and what is the frequency
of the recessive allele in the population of 600.
15. In a certain population, the dominant phenotype occurs 64% of the time. What is the
frequency of the homozygous dominant and heterozygous in the population?
16. Not being able to taste the test paper used in class is recessive to being able to taste it.
So being a non-taster is the recessive phenotype. If 36 out of 100 people could not taste
the test paper, what is the frequencies of heterozygous tasters, homozygous tasters as well
as the frequencies of the p and q alleles?