© 2014 Shmoop University, Inc. All rights reserved.
Mechanisms of Evolution

Mechanisms of Evolution

Mechanisms of Evolution: How Well Do Your Genes Fit True or False

1. Which of the following does NOT negate the Hardy-Weinberg principle?Random mating
2. Which type of speciation occurs when an organism contains more than two copies of chromosomes?Sympatric
3. The mean of a population phenotype for neck length in giraffes is skewed towards taller necks due to an increase in tree height. This is best described byStabilizing selection
4. Selection occurring when two extremes of a population phenotype are favored isDisruptive
5. A trait that is influenced by many genes can be described asPolyploidy
6. Two different species of beetles are unable to mate. This is aNatural selection
7. In a population of tulips, two different alleles exist for flower color. One codes for yellow and the other codes for red. The allelic frequency of the yellow allele is 60%. What percent of the population is homozygous for the red allele?16%
8. Which of the following situations would be an example that could result in gene flow?Two populations of the same bee species feeding from the same population of flowers
9. Which of the following best describes evolution caused by allelic changes in DNA sequence?Adaptive mutations
10. Natural selection occurring when a small group of individuals start a new population is known asBottleneck effect