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Recombinant Dna Technology

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. The screening of embryos for genetic disorders; done in In Vitro fertilization(fertilization in a petri dish); PGD removes one cell from the embryo and screens it genetically; embryos with disorders are discarded - ones without are kept and implanted






2. Way more offspring are produced than by sexual reproduction






3. Choosing the sperm/egg/embryo that will produce the desired child depending on DNA(genes)






4. Differences in appearances between the sexes






5. Came up with the term catastrophism(sudden events that lead to extinction - but not in todays time)






6. Another method designed to sort female sperm form male sperm; goes by size of sperm; females are bigger than male sperm






7. When a population becomes smaller and a few individuals survive the event






8. Sometimes different species share common ancestors






9. A process to help separate DNA fragments using an electrical current; helps to compare DNA samples by fragment pattern






10. Selects for the extremes and against the middle






11. Selection fro or against environment; leads to evolution only if variation has genetic components






12. Forms that show how an organisms anatomy change over time






13. Scientific explanation of how life changes over time - science is based off of evidence - science is obtained with observation and testing - science is always open to question






14. The movement of genes between two populations e.g. migration - immigration






15. The more common a trait becomes the more likely it will be selected against






16. Subset of natural selection that increases the likelihood of mating specifically






17. An accumulation of genetic charges over a certain amount of time






18. Recessive traits persistent to a certain population; recessive alleles hide from selection






19. Set sail on the HMS Beagle to travel the islands and areas for signs of evolution; First book written in 1839 'voyage of the Beagle'; Second book published in 1859 'The Origin of Species by means of Natural Selection






20. Cells that can become any cell in the body; found in the embryo






21. Came up with the term Uniformitarianism(mechanisms for change in the past still occur today; believed at first there was no evolution






22. Heterozygous chromosomes have an affect on an individuals genetics/alleles






23. Form of reproduction more used because it creates Variation






24. Selects for the middle and against the extremes






25. Traits that are neither advantageous nor disadvantageous; there is no selection






26. Direct competition for mates with the same sex






27. The process of sperm sorting; separating the male sperm from the female sperm; difference told by swimming speed; boy sperm swim faster than girl sperm; Theory might have flaws in it though - only works 50% of the time






28. Related organisms have similar development plans






29. In related organisms the underlying anatomy is similar even when the function is different






30. One extreme is selected over the other






31. A circular piece of DNA in bacteria where the gene is placed in Recom. DNA technology






32. A subset of a population colonizes a new area






33. Theory of a stable - nonevolving population in which frequency of alleles do not change; only occurs in large - isolated populations with random mating - and no natural selection or mutations






34. Takes the gene from a needed product - puts it into another organism (usually bacteria) and it will make duplicates of the product






35. Cells that can become only a few different types of cells; mostly adult stem cells; found in bone marrow - the skin epidermis - etc; can sometimes be turned into Totipotent stem cells






36. Taking good genes to replace bad genes; almost never works; has unintended side effects; sometimes just doesn't work; protein becomes degraded - etc






37. The idea that characteristics can enhance an organisms survival






38. A widely accepted idea with lots of evidence






39. Comparing an unknown sample of DNA to a known sample by using Gel Electrophoresis; used in crime scenes - paternity tests - and remains identification






40. Capable of asexual reproduction; most are not






41. Humans selecting certain traits in domestic organisms






42. Change in alleles due to random chance






43. Sexual partners chosen based on some characteristics






44. First to publish mechanisms for evolution; Had 2 idea: Use and disuse - use it more gets bigger; less it disappears - Inheritance of acquired characteristics - pass on changes to offspring






45. 1.edits existing variation by using the material it has(variation that exists in population/ no new traits created by natural selection) 2. Has historical constraints(change in old structures) 3. Adaptations are compromises (good for one thing - bad






46. Directional selection - Disruptive selection - Stabalizing






47. The change in a populations genetics






48. Believed that change was gradual;Gradualism(the mechanisms of the world - then - are the same today)






49. Distribution of organisms related to evolution; different organisms play the same roles on different continents; island organisms resemble organisms on nearby mainland






50. All species on earth are fixed; no changes - no new species - no extinction