MCQ Questions
Q.1.
All the genes in a population are that population's_____.
  • 0%
    mutation
  • 0%
    gene flow
  • 0%
    gene pool
  • 0%
    genetic drift
Q.2.
The evolutionary effects of genetic drift are greatest when _____.
  • 0%
    the population size is small
  • 0%
    crossing over.... prophase I
  • 0%
    mutation
  • 0%
    microevolution
Q.3.
According to the Hardy-Weinberg theorem, the frequencies of alleles in a population will remain constant if _____ is the only process that affects the gene pool.
  • 0%
    The frequency of the A1 allele is 0.3.
  • 0%
    genetic drift
  • 0%
    natural selection
  • 0%
    sexual reproduction
Q.4.
Which of the following are basic components of the Hardy-Weinberg model?
  • 0%
    The genotype frequencies in the offspring generation must add up to two.
  • 0%
    Frequencies of two alleles in a gene pool before and after many random matings
  • 0%
    The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA.
  • 0%
    The frequency of the A1 allele is 0.3.
Q.5.
The ease with which humans travel across the globe is likely to increase _____.
  • 0%
    mutation
  • 0%
    microevolution
  • 0%
    gene pool
  • 0%
    gene flow
Q.6.
Which of the following evolutionary forces could create new genetic information in a population?
  • 0%
    Selection
  • 0%
    B,C,F, and G
  • 0%
    Mutation
  • 0%
    Frequencies of two alleles in a gene pool before and after many random matings
Q.7.
What is the frequency of the A1A2 genotype in a population composed of 20 A1A1 individuals, 80 A1A2 individuals, and 100 A2A2 individuals?
  • 0%
    The frequency of the A1 allele is 0.3.
  • 0%
    True
  • 0%
    0.4
  • 0%
    2-3
Q.8.
No two people are genetically identical, except for identical twins. The main source of genetic variation among human individuals is
  • 0%
    The frequency of the A1 allele is 0.3.
  • 0%
    Alleles that promote "tallness" will decrease in frequency.
  • 0%
    the reshuffling of alleles in sexual reproduction
  • 0%
    The expected genotype frequencies are 0.64, 0.32, and 0.04 for A1A1, A1A2, and A2A2, respectively.
Q.9.
In human gamete production there is an average of _____ crossover events per chromosome pair.
  • 0%
    2-3
  • 0%
    True
  • 0%
    gene flow
  • 0%
    AA
Q.10.
Which of these individuals is a homozygous genotype?
  • 0%
    The genotype frequencies in the offspring generation must add up to two.
  • 0%
    AA
  • 0%
    Frequencies of two alleles in a gene pool before and after many random matings
  • 0%
    B,C,F, and G
Q.11.
Which of the following statements is not a part of the Hardy-Weinberg principle?
  • 0%
    The genotype frequencies in the offspring generation must add up to two.
  • 0%
    The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA.
  • 0%
    The frequency of the A1 allele is 0.3.
  • 0%
    Frequencies of two alleles in a gene pool before and after many random matings
Q.12.
What is the frequency of the A1 allele in a population composed of 20 A1A1 individuals, 80 A1A2 individuals, and 100 A2A2 individuals?
  • 0%
    The frequency of the A1 allele is 0.3.
  • 0%
    Frequencies of two alleles in a gene pool before and after many random matings
  • 0%
    The expected genotype frequencies are 0.64, 0.32, and 0.04 for A1A1, A1A2, and A2A2, respectively.
  • 0%
    the reshuffling of alleles in sexual reproduction
Q.13.
Generation-to-generation change in the allele frequencies in a population is _____.
  • 0%
    the population size is small
  • 0%
    microevolution
  • 0%
    gene flow
  • 0%
    mutation
Q.14.
Homologous pairs of chromosomes are lined up independently of other such pairs during _____.
  • 0%
    microevolution
  • 0%
    metaphase I
  • 0%
    genetic drift
  • 0%
    B,C,F, and G
Q.15.
This animation illustrates _____ as it occurs during _____.
  • 0%
    natural selection
  • 0%
    crossing over.... prophase I
  • 0%
    nonsister chromatids of homologous chromosomes
  • 0%
    the population size is small
Q.16.
Every few years a giant axe chops off the head of every person who is over 6 feet tall. How will this affect the human population?
  • 0%
    Alleles that promote "tallness" will decrease in frequency.
  • 0%
    The genotype frequencies in the offspring generation must add up to two.
  • 0%
    the reshuffling of alleles in sexual reproduction
  • 0%
    The frequency of the A1 allele is 0.3.
Q.17.
A mutation occurs when _____.
  • 0%
    there is a change in the DNA sequence of a gene
  • 0%
    nonsister chromatids of homologous chromosomes
  • 0%
    the reshuffling of alleles in sexual reproduction
  • 0%
    the role of chance
Q.18.
Modern travel along with migration reduces the probability of _____ having an effect on the evolution of humans.
  • 0%
    gene flow
  • 0%
    metaphase I
  • 0%
    genetic drift
  • 0%
    microevolution
Q.19.
Which of the following evolutionary forces results in adaptive changes in allele frequencies?
  • 0%
    B,C,F, and G
  • 0%
    Selection
  • 0%
    gene flow
  • 0%
    Mutation
Q.20.
Blue poppies native to China were grown at a plant-breeding center in California. The plants with the thickest leaves were most likely to survive and reproduce in the drier climate. After several generations, the percentage of thick-leaved plants had increased by 42%. This adaptation of the poppies to their new environment is due to _____.
  • 0%
    directional selection
  • 0%
    natural selection
  • 0%
    genetic drift
  • 0%
    sexual reproduction