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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. Hybrid is sterile so biologically unfit






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






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






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






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






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






7. Proteins are made of...






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






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






10. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






11. The movement of genes between populations as a result of mating of migration






12. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found






13. 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






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






15. The comparison of the structures of different organisms






16. Visual expression of a trait






17. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






18. During transcription an RNA molecule is formed






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






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






21. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






22. Evolution of living things - based on evidence from the past and present.






23. A change in the base sequence of a gene






24. When F1 is fully fertile but F2 has low fertility (rice - cotton)






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






26. Change to a chromosome in which a fragment of the chromosome is removed






27. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






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






29. Because of base pairing in DNA the amount of






30. The study of the structures of different organisms - looking at homologous parts






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






32. The study of the past and present distribution of species.






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






34. Translation occurs in the...






35. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






36. 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.






37. A trait that masks the expression of another trait






38. Evolution resulting from small specific genetic changes that can lead to a new subspecies






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






40. Transcrition occurs in the...






41. Building block of a protein






42. Separates DNA by size






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






44. Breeding organisms with specific traits in order to produce offspring with identical traits






45. The environmental factors that favour certain phenotypes






46. 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






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






48. The type of environment in which an organism or group normally lives or occurs






49. 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.






50. A change in the base sequence of DNA; the ultimate source of new alleles