BSCS Biology: A Molecular Approach

Chapter 16: Population Genetics

Chapter Test

1.
What field of study focuses on microevolution?
A)molecular genetics
B)gene pool genetics
C)genome genetics
D)population genetics
2.
The gene pool of a population consists of ____.
A)all the alleles found in the local, sexually-reproducing population
B)all the alleles for the species
C)all the homozygous genes for the species
D)all the polymorphic traits in a population that interbreeds
3.
In humans, the genomes are about 99.9% the same. This translates into approximately how many variable nucleotide sites?
A)3 trillion
B)3 billion
C)3 million
D)300,000
4.
What are two sources of variations in gene pools?
A)mutations and recombination during meiosis
B)mutations and recombinations during mitosis
C)polymorphism and mutations
D)codon transfer and recombinant DNA sequencing
5.
Using the Hardy-Weinberg model for purple flowers (p) and white flowers (q), the frequency of heterozygous plants will be ____.
A)q2
B)p2
C)2pq
D).5pq
6.
Which of the following is not an assumption of the Hardy-Weinberg model?
A)Populations are very large.
B)Gametes unite randomly.
C)Mutations occur frequently.
D)Generations do not overlap.
7.
Which of the following explains most of the variation in gene pools of large populations over time?
A)gene flow
B)genetic drift
C)mutation
D)natural selection
8.
Geographic isolation would limit which of the mechanisms of changes in gene pools shown in the table?
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A)natural selection
B)genetic drift
C)gene flow
D)mutation
9.
The gradual increase in homozygotes in a small population over time is known as ____.
A)inbreeding
B)progeny reduction
C)the founder effect
D)genetic trait loci
10.
Which of the following best describes artificial selection?
A)The controlled breeding of a plant or animal population to change the allele frequency in a population.
B)The random breeding of plants or animals with desirable traits to achieve high reproductive success.
C)The controlled breeding of plant or animal populations to avoid population bottlenecks.
D)The random breeding of plant or animal populations in one geographic area with plant or animal populations in another geographic area.
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