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1 | |
Evolution occurs at the __________ level as gene frequencies change. |
| | A) | community |
| | B) | population |
| | C) | individual |
| | D) | species |
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2 | |
Evolution is more likely than not because ______________. |
| | A) | organisms have large numbers of genes |
| | B) | many factors have the potential to alter gene frequencies |
| | C) | both of these are correct |
| | D) | neither of these are correct |
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3 | |
Movement of genes between populations is called __________. |
| | A) | equilibrium exchange |
| | B) | gene flow |
| | C) | directional mutation |
| | D) | random interbreeding |
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4 | |
In the Hardy-Weinberg equation, (p2 + 2pq + q2), what does q represent? |
| | A) | homozygous recessive individuals |
| | B) | heterozygous individuals |
| | C) | homozygous dominant individuals |
| | D) | frequency of the recessive allele |
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5 | |
In the Hardy-Weinberg equation, (p2 + 2pq + q2), what does 2pq represent? |
| | A) | homozygous recessive individuals |
| | B) | heterozygous individuals |
| | C) | homozygous dominant individuals |
| | D) | frequency of the recessive allele |
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6 | |
The frequency of a homozygous recessive in the F1 generation would be ____________, when Hardy-Weinberg equilibrium is met and the original dominant allele (A) has a frequency of 0.6. |
| | A) | 0.36 |
| | B) | 0.16 |
| | C) | 0.48 |
| | D) | 1 |
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7 | |
True or false. If the conditions of Hardy-Weinberg equilibrium are met, and allele and genotype frequencies do not change over time, then evolution will not occur. |
| | A) | True |
| | B) | False |
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8 | |
True or false. The conditions for Hardy-Weinberg equilibrium are frequently met in natural populations. |
| | A) | True |
| | B) | False |
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9 | |
What condition(s) is/are associated with evolutionary change in populations? |
| | A) | migration between populations |
| | B) | mutation and introduction of new alleles |
| | C) | mating is nonrandom (individuals exert a preference) |
| | D) | All of these are correct. |
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10 | |
True or false. Human populations must be considered separately from other populations when looking at the forces of evolutionary change. For example, human populations are not subject to nonrandom mating. |
| | A) | True |
| | B) | False |
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11 | |
True or false. The high frequency of albinism among Arizona’s Hopi Indians is an example of genetic drift. |
| | A) | True |
| | B) | False |
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12 | |
Allele frequencies that change progressively across a region because of close geographical barriers are called ___________. |
| | A) | races |
| | B) | breeds |
| | C) | clines |
| | D) | subspecies |
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13 | |
Evolution because of chance elimination of alleles from a population is called __________. |
| | A) | genetic drift |
| | B) | natural selection |
| | C) | microevolution |
| | D) | macroevolution |
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14 | |
Genetic drift may arise due to _____________. |
| | A) | chance |
| | B) | population bottleneck |
| | C) | founder effect |
| | D) | All of these are correct. |
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15 | |
The collection of recessive harmful genetic traits in a population, called ____________, may be the target of some future natural selection. |
| | A) | genetic variation |
| | B) | recessive collections |
| | C) | genetic load |
| | D) | genetic recombination |
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16 | |
_____________________ can cause two different species to form from one parent species. |
| | A) | Directional selection |
| | B) | Stabilizing selection |
| | C) | Disruptive selection |
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17 | |
Industrial melanism seen in insects is an example of ____________. |
| | A) | directional selection |
| | B) | stabilizing selection |
| | C) | disruptive selection |
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18 | |
Individuals that carry the recessive sickle-cell gene in heterozygous condition are resistant to __________. |
| | A) | cholera |
| | B) | small pox |
| | C) | AIDS |
| | D) | malaria |
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19 | |
Balanced polymorphism is an example of ______________. |
| | A) | directional selection |
| | B) | stabilizing selection |
| | C) | disruptive selection |
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20 | |
A person with the cystic fibrosis allele is resistant to ___________. |
| | A) | cholera |
| | B) | small pox |
| | C) | AIDS |
| | D) | malaria |
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