December Final sample questions

December Final sample questions - BIOLOGY 1223 Sample...

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BIOLOGY 1223 Sample questions Dec 09 Page 1 of 7 1. Which of the following ideas is not included in modern evolutionary theory? A. The great variety of species alive today resulted from the diversification of ancestral species. B. Natural selection drives all evolutionary change. C. Genetic drift may eliminate both adaptive and non adaptive traits. D. All organisms that have ever existed arose through evolutionary modifications of ancestral species. E. Natural selection preserves adaptive traits. 2. An individual's biological fitness is measured by A. its ability to survive relative to other individuals. B. its relative contribution to the gene pool of the next generation. C. how early it can begin to reproduce. D. its resistance to disease and parasites. E. its ability to compete with other individuals for key resources. 3. A gene pool can best be described as A. that group of genes in a genome that are in Hardy-Weinberg equilibrium. B. that group of genes responsible for polygenic traits. C. those genes found only in isolated populations. D. the total number of gene loci that occurs in each species. E. the total collection of genes in an individual organism. 4. Which of these evolutionary factors will not alter allele frequencies in a Hardy- Weinberg population? A. natural selection B. random mating C. genetic drift D. migration E. mutation 5. The Hardy-Weinberg Equilibrium states that A. populations evolve only when environmental conditions change. B. there is a predictable, constant distribution of phenotypes in any population that is not evolving. C. populations can evolve only if the forces of natural selection act on them. D. evolution does not occur naturally; rather, it is a result of human interference (e.g. animal breeding). E. large populations (N>1,000) with great genetic variability are less likely to evolve than are smaller populations (N<100) with less genetic variability. 6. A population of mice is at Hardy-Weinberg equilibrium at a gene locus that controls fur color. The locus has two alleles, M and m . A genetic analysis of one population reveals that 60% of its gametes carry the M allele. What percentage of mice contain both the M and m alleles? A. 16% B. 36% C. 60% D. 48% E. 40% 7. A rare lethal recessive allele (r) occurs with a frequency of one in a thousand (.001). In a town of 14,000 people, approximately how many people would carry this rare allele? A. 280 B. 465 C. 857 D. 28 E. 140
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BIOLOGY 1223 Sample questions Dec 09 Page 2 of 7 8. Phenotypic characteristics that increase the fitness of individuals are called A. founder effects. B. mutations. C. polymorphisms. D. adaptive traits. E. heterozygote advantages. 9. The smallest biological unit that can evolve is A. a species. B. a population.
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December Final sample questions - BIOLOGY 1223 Sample...

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