BIOL 133 Week 16 Quiz

BIOL 133 Week 16 Quiz | American Public University System

Question 1  

A group of birds migrate to a newly formed island and have a genetic makeup that is different from the original population. This is known as ________? 

  A. phenotype frequency

  B. allelic variation

  C. the founder effect

  D. the modern synthesis

  E. hybrid mutation

 

Question 2 

In South America, there is a specific type of frog where the male uses a loud call in order to attract females, even though this makes him more likely to be found by a predator. This is an example of 

  A. gene flow

  B. stabilizing selection

  C. the handicap principle

  D. sexual dimorphism

 

Question 3 

 

Cheetahs, once hunted to near extinction, are now protected and recovering, although the number of different alleles at 5 different loci has dropped from 28 to 16. This is an example of ________.

 

  A. reduced mutational activity

  B. allelic stabilization

  C. gene flow

  D. a bottleneck 

 

Question 4  

What does the term 2pq represent in the Hardy-Weinberg principle? 

  A. the frequency of the homozygous dominant individuals in the population

  B. the frequency of the heterozygous individuals in the population

  C. the frequency of the homozygous recessive individuals in the population

  D. the frequency of the recessive allele in the population

 

Question 5  

If alleles that cause disease are constantly being selected against, why would there be any disease-causing alleles in a population over generations? 

  A. natural mutations would be happening at a constant, low level

  B. to be used as surveillance for any new disease-causing organisms

  C. the bad alleles would eventually all disappear

  D. some bad alleles would have to remain to prevent overpopulation 

 

Question 6

What is the only way to introduce a new allele into a species? 

  A. migration

  B. natural selection

  C. genetic drift

  D. mutation 

 

Question 7  

Although Lamarck’s idea of inheritance of acquired characteristics was demonstrated to be false, there is a way in which exposure to some environmental factors can be passed on to offspring. This is known as 

  A. stabilizing polymorphisms

  B. acquired mutability

  C. environmental heritablility

  D. epigenetics

 

Question 8 

The accumulation of mutations in a population over generations leads to 

  A. nonrandom mating

  B. extinction

  C. decreased variability

  D. evolution 

 

Question 9 

The fact that being homozygous recessive for the CCR5 receptor protects people from being infected with HIV, thus causing an increase in the recessive CCR5 allele, is an example of 

  A. microevolution

  B. founder effect

  C. macroevolution

  D. allele switching

 

Question 10  

Population bottlenecks and founder effects 

  A. both result in genetic variation due to extreme conditions

  B. both result in an increased mutation rate in the population

  C. have opposite effects on population variation

  D. both lead to genetic drift, which reduces variation in the population