Bio Study Exam 3 Word Scramble
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| Question | Answer |
| Which of the following genotypes show dominant phenotypes?<br><br>A. DD and Dd<br>B. DD and dd<br>C. Dd<br>D. DD<br>E. dd | A. DD and Dd |
| If R is dominant to r, the offspring of a cross of RR with rr will<br><br>A. display same phenotype as RR parent<br>B. have same genotype as rr parent<br>C. display same phenotype as rr parent<br>D. have same genotype as RR parent<br>E. be homozygous | A. display same phenotype as RR parent |
| Which of the following is/are heterozygous?<br><br>A. Bb and BB<br>B. Bb<br>C. Bb and bb<br>D. bb<br>E. BB | B. Bb |
| Which of the following designates a normal human male?<br><br>A. XX<br>B. XO<br>C. XY<br>D. YO<br>E. XXY | C. XY |
| The theory of segregation<br><br>A. explains the behavior of a pair of alleles during meiosis<br>B. applies only to linked genes<br>C. deals with the alleles governing two different traits<br>D. has been disproven<br>E. applies only to sex-linked genes | A. explains the behavior of a pair of alleles during meiosis |
| Mutations that neither harm nor help an organism are called<br><br>A. neutral<br>B. recessive<br>C. dominant<br>D. deleterious<br>E. lethal | A. neutral |
| Which of the following evolve?<br><br>A. phyla<br>B. individuals<br>C. genera<br>D. kingdoms<br>E. populations | E. populations |
| Allopatric speciation requires<br><br>A. adaptive radiation<br>B. rapid evolutionary change<br>C. geographic isolation<br>D. polyploidy<br>E. gradual evolutionary changes | C. geographic isolation |
| In the biological species concept, what aspect of a population is critical in determining species?<br><br>A. similar behavior patterns<br>B. similar genotypes<br>C. interbreeding capabilities<br>D. polyploidy<br>E. physical appearance | C. interbreeding capabilities |
| The punctuation model of evolutionary change proposes that most morphological change occurs<br><br>A. rapidly leading to new species<br>B. gradually during speciation<br>C. gradually without making new species<br>D. rapidly without speciation<br>E. none | A. rapidly leading to new species |
| Which of the following genotypes show(s) recessive phenotypes?<br><br>A. Bb<br>B. BB and bb<br>C. bb<br>D. Bb and BB<br>E. BB | C. bb |
| In Mendel's time, most people believed that<br><br>A. only some forms of animals and plants bred true<br>B. inheritance was controlled by blood<br>C. characteristics were blended in offspring<br>D. all traits bred true<br>E. characteristics were inherited | C. characteristics were blended in offspring |
| If all offspring of a cross have the genotype Bb, the parents of the crosses would most likely be<br><br>A. Bb x Bb<br>B. BB x Bb<br>C. Bb x bb<br>D. BB x bb<br>E. none of these | D. BB x bb |
| All of the genes located on a given chromosome comprise a<br><br>A. bridging cross<br>B. wild-type allele<br>C. karyotype<br>D. linkage group<br>E. none of these | D. linkage group |
| A locus is<br><br>A. a dominant allele<br>B. the location for an allele on a chromosome<br>C. an unmatched allele<br>D. a sex chromosome<br>E. a recessive gene | B. the location for an allele on a chromosome |
| According to Darwin, natural selection is based on the ________ foundation in populations.<br><br>A. variations<br>B. acquired traits<br>C. similarities<br>D. weakest members<br>E. noncompetitors | A. variations |
| Fossils found in the lowest geological strata are generally the most<br><br>A. primitive<br>B. widespread<br>C. advanced<br>D. specialized<br>E. complex | A. primitive |
| Complete reproductive isolation is evidence that what has occurred?<br><br>A. speciation<br>B. gene flow<br>C. hybridization<br>D. polyploidy<br>E. extinction | A. speciation |
| Members of the same species would be expected to<br><br>A. resist evolution<br>B. have the same phenotype<br>C. be reproductively isolated from one another<br>D. share the same gene pool<br>E. look alike | D. share the same gene pool |
| Which of the following groups represents the most closely related organisms?<br><br>A taxa<br>B kingdoms<br>C. orders<br>D. genera<br>E. species | E. species |
| Which of the following indicates homozygous genotypes?<br><br>A. Bb<br>B. BB<br>C. BB and bb<br>D. BB and Bb<br>E. bb | C. BB and bb |
| A chromosome that has been broken and rejoined in a reversal sequence has undergone<br><br>A. translocation<br>B. deletion<br>C. inversion<br>D. crossing over<br>E. duplication | C. inversion |
| In an unchanging environment, selection in a well-adapted population is usually<br><br>A. absent<br>B. disruptive<br>C. directional<br>D. stabilizing<br>E. none of these | D. stabilizing |
| True or False: Darwin did not know for sure which mechanisms were responsible for the variation he saw in the species of finches during his observation. | True |
| Which is NOT necessary for sympatric speciation?<br><br>A. geographical barriers<br>B. existing interbreeding populations<br>C. reproductively mature individuals<br>D. "same homeland"<br>E. organisms living together in the same location | A. geographical barriers |
| Scientists have traditionally drawn evolutionary diagrams in the form of<br><br>A. pyramids<br>B. nested squares or boxes<br>C. a set of parallel lines<br>D. a tree<br>E. interlocking circles | D. a tree |
| Which of the following organisms would you expect to find preserved as a fossil?<br><br>A. a shelled arthropod such as a trilobite<br>B. a nematode<br>C. an earthworm<br>D. a jellyfish<br>E. a protistan such as an amoeba | A. a shelled arthropod such as a trilobite |
| If all the offspring of a test cross are alike and resemble the organism being tested, then that parent is<br><br>A. homozygous recessive<br>B. recessive<br>C. incompletely dominant<br>D. heterozygous<br>E. homozygous dominant | E. homozygous dominant |
| A chromosome's gene sequence that was ABCDEFG before modification and ABCDCDEFG afterward is an example of<br><br>A. translocation<br>B. crossing over<br>C. inversion<br>D. duplication<br>E. deletion | D. duplication |
| All of the genes located on a given chromosome comprise a<br><br>A. karyotype<br>B. bridging cross<br>C. wild-type allele<br>D. linkage group<br>E. none of these | D. linkage group |
| New alleles arise by<br><br>A. random mating<br>V. independent assortment<br>C. migration<br>D. mutation<br>E. genetic drift | D. mutation |
| Which of the following is NOT a useful indicator of phylogenetic relatedness?<br><br>A. similar embryonic development<br>B. base sequences in DNA<br>C. amino acid sequences in a protein<br>D. similar ecological requirements<br>E. morphological divergence | D. similar ecological requirements |
| If a daughter expresses an X-linked recessive gene, she inherited the trait from<br><br>A. her father<br>B. her mother<br>C. neither parent<br>D. her grandmother<br>E. both parents | E. both parents |
| Speciation caused by the break of the continents would be by<br><br>A. gene flow<br>B. allopatry<br>C. divergence<br>D. sympatry<br>E. parapatry | B allopatry |
| Fossils would include<br><br>A. tracks<br>B. shells<br>C. seeds<br>D. skeletons<br>E. all of these | E. all of these |
| Isolating mechanisms that take effect before or during fertilization are termed<br><br>A. genetically divergent<br>B. hybridizing<br>C. persistent<br>D. postzygotic<br>E. prezygotic | E. prezygotic |
| Which of the following would be the least satisfactory organism for genetic research?<br><br>A. peas<br>B. corn<br>C. humans<br>D. fruit flies<br>E. bacteria | C. humans |
| Which of the following serve as examples of morphological convergence?<br><br>A. apes and monkeys<br>B. panthers and tigers<br>C. sharks, skates, and rays<br>D. sharks, penguins, and porpoises<br>E. mice, rats, and gerbils | D. sharks, penguins, and porpoises |
| The gradual model of evolutionary change proposes that most morphological change occurs<br><br>A. gradually without developing new species<br>B. gradually during speciation<br>C. rapidly without speciation<br>D. rapidly forming new species<br>E. none | B. gradually during speciation |
| Allopatric speciation requires<br><br>A. rapid evolutionary change<br>B. gradual evolutionary changes<br>C. geographic isolation<br>D. polyploidy<br>E. adaptive radiation | C. grographic isolation |
| If tall (T) is dominant to dwarf (d), and TT and dd are crossed, what kind of offspring will be produced?<br><br>A. 3/4 tall, 1/4 dwarf<br>B. 1/2 tall, 1/2 dwarf<br>C. all dwarf<br>D. all tall<br>E. all intermediate forms | D. all tall |
| Various forms of a gene at a given locus are called<br><br>A. chromatids<br>B. autosomes<br>C. alleles<br>D. loci<br>E. chiasmata | C. alleles |
| Which mutations are NOT subject to natural selection?<br><br>A. neutral<br>B. morphological<br>C. beneficial<br>D. physiological<br>E. lethal | A. neutral |
| According to Mendel, what kind of genes "disappears" in F<sub>1</sub> plants?<br><br>A. lethal<br>B. dominant<br>C. sex-linked<br>D. codominant<br>E. recessive | E. recessive |
| Which of the following arose first?<br><br>A. fungi<br>B. protists<br>C. archaebacteria<br>D. animals<br>E. plants | C. archaebacteria |
| Biologists believe mitochnodria<br><br>A. were once separate, free-living organisms, not organelles<br>B. were symbionts, where mcndrn and cell inhabited both benefitted<br>C. Mcndrl DNA was parallel to but older than nuclear DNA<br>D. all<br>E. none | D. all |
| The term "reproductive isolating mechanism" refers to<br><br>A. process where sexual selection evolves in populations<br>B. inability of species to reproduce<br>C. blocked gene flow between populations<br>D. areas where males compete for females<br>E. all | C. blocked gene flow between populations |
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