old_test1 - Form A Nameiprint BED 3| 1D Spring 200:5 Dr...

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Unformatted text preview: Form A Nameiprint}: BED 3| 1D Spring 200:5 Dr. Zhan Nmnclfisignt EXAM I SELECT THE SINGLE BEST ANSWER FDR EACH OF THE FULLflWING: (2.5 points for each question] 1. Which is NOT an example of evolution? . Development of antibiotic-resistant bacteria. . Flightless birds on islands without predators. . This year's flu is different from last year's flu. . A dog learns how to open the cabinet where its food is kept. . Most commercial pesticides are effective for 2-3 years. I'llfiaflb'll 2. Which of the following statements is not an observation about natural selection? a. There is some variation within a population. b. Competition between populations increases variation. c. Individuals with advantageous characteristics tend to survive. d. Survivors pass their advantageous characteristics to their offspring. e. Most species overproduce offspring. 3. What is the correct format for the scientific name of an extinct carnivorous dinosaur? a. txranncsaurus Rex b. if anncsaurus Rex ann uru r c. r osa s rex d. Tyrannosaurus rex e. tgrannosaurus ten 4. Species that are in the same are more closely related than species that are only in the same a. family ... order b. kingdom ... phylum c. family ... genus d. class ... order s. phylum ... class 5. If DdEe were crossed with Erfl'ee,r what proportion of the offspring are expected to be DdEe: a. 1f4 1}. 3H c. 1}: d. All e. None 10. 1].. 12. If two species have homologous structures, they: have the same function. are identical in structure. are related by a common ancestry. have very different ancestors. have both the same structure and function. moon's . Random evolutionary changes in a small breeding population is known as: a. gene flow. b. genetic drift. c. disruptive selection. d. natural selection. e. mntagenesis. Speciation: a. maintains an intermediate phenotype in a stable environment. b. is the formation of a new species from an ancestral population. c. only occurs when a population is geographically isolated. d. is a change in allele frequencies in a population. Which of the following represents a presygotic barrier to reproduction? a. hybrid sterility b. hybrid breakdown c. behavioral isolation d. hybrid inviability e. hybridization Prokaryotes are found in the Kingdom: a. Eubacteria. b. Fungi. c. Protista. d. hnimalia. e. Plantae. An example of homologous structures is the wing of a hat and: a. the arm of a human. b. the wing of a beetle. c. the tail of a whale. d. the wing of an airplane. e. the wing of a butterfly. Shared ancestral characters may also be called: a. heteroplastic characters. b. synapomorphic characters. c. pleisomorphic characters. d. outgroups. e. phenetic characters. 13. Hhich of the following terms belongs least suitably with the others? a. synapsis b. chiasmata c. tetrad d. metaphase e. crossing over The following question {#14} refer to the essential steps in meiosis described below. 1. formation of four new nuclei, each with half the chromosomes present in the parental nucleus 2. alignment of tetrads at the equator of cell 3. separation of sister chromatids 4. separation of the homologous chromosomes 5. homologous chromosomes pairing {synapsis} to form tetrads 14. From the descriptions above, which of the following is the order that most logically illustrates a sequence of meiosis? a. 1, 2, 3, 4. 5 h. 5, 3, 2, 4. l C. 5, 2: 4! 3! l d. 5, 4, 2, 1, 3 e. 4. 5. 2. 1, 3 15. What do a fungus. a tree. and a human have in common? a. They are all composed of cells with nuclei. h. They are all prokaryotic. c. They all have cell walls. d. They are all members of the same class. e. They are all members of the same kingdom. 15. Which of the following statements is false? a. Individuals with the same phenotype might have different genotypes. ' b. Hatings between individuals with dominant phenotypes cannot produce offspring with recessive phenotYPes. c. Matings between individuals with recessive phenotypes usually do not produce offspring with dominant phenotypes. d. Individuals with the same genotype might have different phenotypes. e. Individual's phenotype may caused by incomplete dominance. 1?. The phases of meiosis that cause the most variation in the four resulting daughter cells are a. prophase II and anaphase II. b. metaphase I and telophase II. c. anaphase I and prophase II. d. prophase I and anaphase I. e. prophase I and telophase II. 19. 2Q. 21. 22. 23. In a cross between parents who both exhibit the dominant curly- and dark-haired traitsr one child has straight, light—colored hair. What-is the hair genotype of the parents? CoDd multiply ccdd Ccdd multiply Cch econ Imlltiply L”:ch Cch multiply Cch CCdd multiply chd moon‘s Each sperm cell of a horse contains 32 chromosomes. How many chromosomes are there in each of the horse*s body cells? a. 15 b. 32 c. 16 pairs d. Either id or 64. depending on the cell type e. 54 According to the Law of segregation. ha: a. All the gametes will have gene g b. all the gametes will have gene a c. Half the gametes will have A and half will have a d. lie of the gametes will have—fi_and lfi will have a e. lie of the gametes will have §_and lie will have 5 in an organism with the genotype Some species of Anopheles mesquite live in brackish water, some in running fresh water. and others in stagnant water. What type of reproductive barrier is most obviously separating these different species? a. habitat isolation h. temporal isolation c. behavioral isolation d. gametic isolation e. postzygotic isolation Two species of frogs belonging to the same genus occasionally mate, but the offspring do not complete development. what is the mechanism for keeping the two frog species separate? a. the postsygotic barrier called hybrid inwiability b. the postzygotic barrier called hybrid breakdown c. the prezygotic barrier called hybrid sterility d. gametic isolation e. adaptation The biological species concept is inadequate for grouping a. plants. b. parasites. c. asexual organisms. d. animals that migrate. e. sympatric populations. . A defining characteristic of allopatric speciation is a. the appearance of new species in the midst of old ones. b. asexually reproducing populations. c. geographic isolation. d. artificial selection+ e. large populations. 25. Mutations: a. Are random h. flccur to solve problems for species [are goal oriented} c. Can alone cause changes in the gene frequencies of a population d. Only choices a. and b. are correct e. None of the above 26. The diploid chromosome number of a person with Turner’s syndrome is 45; how many chromosomes are likely to be in her gametes? a. 4? b. 22.5 c. 46 d. 22 or 23 e. none of these 2?. What are the possible phenotypes of the children if the mother has Type s.blood and the father has type EB blood? a. all AB h. 1;: s: 1!: s c. 13'2 A: 1.!"2 AB :1. Hz s: 1H s: 1:“: as e+ Insufficient information is available 23. Huntington's disease is caused by a dominant allele. If one of Joe's parents has the disease. what is the probability that Joe, too. will have the disease? a. 3H4 b. 1 c. if: d. lid e. c 29. A man who carries an x-linked allele will pass it on to a. all of his children. b. half of his daughters. c. all of his sons. d. half of his sons. e. all of his daughters. 30. If two modern organisms are distantly related in an evolutionary sense. then one should expect that a. they live in very different habitats. b. they should share fewer homologous structures than two more closely related organisms. c. their chromosomes should be very similar. d. they shared a common ancestor relatively recently. e. they should be members of the same genus- 31. A person with Klinefelter syndrome has how many sex chromosomes in each of his body cells? a. 23 b. 1 c. 2 d. 3 e. 24 32. All of the following are criteria for maintaining Hardy—Weinberg equilibrium inyoluing two alleles except a. the frequency of all genotypes must be equal. b. there should be no natural selection. C. matings must be random. :1. populations must be large. e. gene flow from other populations must be zero. 33. Mules are relatiyely long-lived and hardy organisms that cannot. generally speaking; perform successful meiosis. Which statement about mules is true? a. They have no evolutionary fitness. b. Their offspring have less genetic variation than the parents. c. Mutations cannot occur in their genomes. d. If crossing over happens in males. then it must be limited to prophase of binary fission. e. When two mules interbreed. genetic recombination cannot occur by meiotic crossing over, but only by the act of fertilization. 34. According to Lamarck's hypothesis, giraffes have long necks: a. by acquiring them through natural selection. b. by inheriting mutations that resulted in long necks. c. by stretching them over time. d. because they were created that way. e. by dominant inheritance. For short answer questions, give concise. intelligible answers; complete sentences are no necessary. [3pm For each of the genotypes shown below, indicate all of lhe possible gamflts lhal an individual with Ihe given genotype could produce {assume that in each case the genes are located on differenl chromosomes]: RINn: GGMr ssthc: {Rots} Fill in the blank: An individual with two identical alleles of a gene is said to be , while with two different alleles for the same gene is said to he 1 single—selled organisms that lack a nucleus belong to the two domains and {iptslflatohing: s. The statement-is true for mitosis only. E. The statement is true for meiosis I only. C. The statement is true for mitosis and meiosis II. D. The statement is true for mitosis and meiosis I. {Eptslnefine1 Synapsis: Phylogeny: Taxonomy: 1. Homologous chromosomes synapse and crossing over occurs. '2. This occurs when a cell divides to form two cells that are genetically identical. 3. Centromeres unoouple and ohromatids are separated from each other. 4. The processies}isiarelprooeded by copyingireplicationlof the DNA ...
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This note was uploaded on 05/05/2008 for the course BIO 52010 taught by Professor Zhao during the Fall '07 term at University of Texas.

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old_test1 - Form A Nameiprint BED 3| 1D Spring 200:5 Dr...

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