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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. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






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






3. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






4. Proteins are made of...






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






6. Chromosomes are collections of many






7. Change in a DNA sequence that affects genetic information






8. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






9. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






10. A base found in DNA (but not in RNA). This base pairs with Adenine.






11. A limb with five digits (fingers)






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






13. Method of replication that implies that each new strand of DNA is half original and half new






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






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






16. Determined the concept of complementary base pairing






17. An evolutionary 'branch' and its daughter 'twigs'






18. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






19. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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20. What does DNA stand for...






21. Is the evolutionary process whereby a population becomes better suited to its habitat






22. Nucleotides that control which amino acids are added during protein synthesis






23. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






24. Found only in that country






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






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






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






28. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






29. The evolutionary process by which a species becomes better suited to its niche.






30. The adaptive increase in pigmentation as a result of human - induced pollutants






31. When competition causes two closely related species to become more different in regions where their ranges overlap






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






33. A geographic gradient in the extent to which a character is developed in a species






34. The environmental factors that favour certain phenotypes






35. Three mRNA nucleotides that code for a specific amino acid






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






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






38. DNA is made of...






39. Form of reproductive isolation in which tere are differences in species courtship behavior






40. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






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






42. Process by which a ribosome uses the code on mRNA to make proteins






43. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






44. The independant evolution of similar traits - starting from a similar ancestral condition






45. A change in the base sequence of a gene






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






47. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






48. DNA that is coiled around proteins






49. A combining of genes or characters different from what they were in the parents






50. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.