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CSET Genetics And Evolution

Subjects : cset, science, genetics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






2. Embryos of similar organisms have very similar early development indicating similar DNA at work






3. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






4. During transcription an RNA molecule is formed






5. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






6. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






7. Condition in which an organism has extra sets of chromosomes






8. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






9. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






10. Two alternative forms of a gene e.g Tall vs Short






11. One of the identical rods of a chromosome.






12. The complete genetic material contained in an individual






13. Human - like species that existed millions of years ago as witnessed through fossil evidence.






14. Closely related species occupying different habitats - niches preventing them from interbreeding






15. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






16. Group of individuals of the same species that live in the same area






17. Form of reproductive isolation in which two populations reproduce at different times






18. T or F If a nucleic acid contain uracil it is DNA






19. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






20. Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next






21. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






22. Transfer RNA; type of RNA that carries amino acids to the ribosome






23. Selection acting against the middle of a range of variation






24. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






25. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






26. A group of organisms of the same species occupying a given area.






27. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






28. Even if the gametes of the two species meet - fertilization does not occur






29. The study relating the evolution of new charateristics to changes in the genes controlling development






30. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






31. DNA that is coiled around proteins






32. A taxon originating from and including a single common ancestor






33. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






34. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






35. Natural selection that causes the frequency of a particular allele to move in one direction






36. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






37. The final product of transcription is...






38. Gradual evolution within a lineage






39. Periods of rapid evolution punctuated by periods of little change






40. A distinct population of a species that varies from other populations of the same species.






41. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






42. The study of the past and present distribution of species.






43. A pairing where the parent plants differ in only one character.






44. A change or error in the DNA sequence






45. The backbone of DNA consist of...






46. A trait that masks the expression of another trait






47. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






48. Cross where you cross unknown genotype with a recessive






49. Visual expression of a trait






50. The structure on a tRNA molecule that allows it interact with an mRNA molecule