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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. Innate trait; shared ancestry






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






3. Selection for the ability to obtain a mate






4. A DNA double helix is held together in the center by between nitrogenous bases






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






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






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






8. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






9. DNA that is coiled around proteins






10. Building block of a nucleic acid (DNA and RNA)






11. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






12. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






13. The enzyme that binds to the promoter region of a gene during transcription is called...






14. The backbone of DNA consist of...






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






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






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






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






19. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






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






21. Building block of a protein






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






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






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






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






26. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






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






28. 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.






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






30. Is active during transcription






31. What happens during the process of translation






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






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






34. Synonym for protein; chain of amino acids






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






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






37. 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.






38. 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.






39. Organ that serves no useful function in an organism






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






41. The number of times an allele appears in a population






42. 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






43. Situation in which allele frequencies remain constant






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






45. 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






46. A population partially isolated from other populations of the same species






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






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






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






50. These prevent fertilization between species e.g. diff breeding season - mating behaviour