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






2. Actual remains of an organism such as bones - teeth - shells - etc.






3. Another term for pure breeding






4. Organ no longer serves a function






5. Separates DNA by size






6. The complete genetic material contained in an individual






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






8. The formation of new species as a result of evolution






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






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






11. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






12. Speciation which does not involve a period of geographical separation






13. Which structure contains anticodons






14. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






15. Speciation preceded by a period of geographical isolation






16. T or F A cloned organism has the same proteins as another organism






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






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






19. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






20. The region of the chromosome that holds the two sister chromatids together during mitosis






21. Movement of alleles into or out of a population due to the migration of individuals to or from the population






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






23. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






24. Mutation where an extra base is added






25. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






26. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






27. The final product of transcription is...






28. Used x ray cyrstallography to create an image of DNA






29. Type of sympatric speciation that occurs when a new species is formed because of a change in microhabitats






30. Hybrid is sterile so biologically unfit






31. Movement of organisms ro of from a population






32. Recognize and cut DNA at specific sequences usually palindromes






33. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






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






35. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






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






37. Predicts the possible outcome of a genetic cross.






38. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






39. One of the identical rods of a chromosome.






40. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






41. The evolutionary history/geneology of a group of organisms (a tree thingy)






42. A mutation in which one nucleotide is replaced by another nucleotide






43. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






44. The gradual changes in gene frequencies in a population due to random events






45. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






46. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






47. Large - scale evolutionary changes that take place over long periods of time






48. An ancestor that two or more descendants have in common






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






50. Disappearance of a species from all parts of its geographical range