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






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






3. DNA that is coiled around proteins






4. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks






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






6. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






7. Separation of species or populations so that they cannot interbreed and produce fertile offspring






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






9. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






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






11. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






12. Speciation preceded by a period of geographical isolation






13. The environmental factors that favour certain phenotypes






14. The sum total of an organism's requirements; its way of life






15. Is found in DNA






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






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






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






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






20. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






21. Consists of all genes - including all the different alleles - that are present in a population






22. Independent segregation of genes during the formation of gametes






23. Recognize and cut DNA at specific sequences usually palindromes






24. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






25. 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.






26. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






27. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






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






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






30. A change or error in the DNA sequence






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






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






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






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






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






36. The backbone of DNA consist of...






37. The molecules responsible for bringing amino acids to the ribosome during protein synthesis are






38. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






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






40. A unique combination of traits that are passed down from one generation to another.






41. During transcription an RNA molecule is formed






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






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






44. Determined the complete double helical structure of DNA






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






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






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






48. Dna moves during electrophoresis because of...






49. 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.






50. Organ no longer serves a function







Sorry!:) No result found.

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