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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. Cross where you cross unknown genotype with a recessive






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






3. Another term for pure breeding






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






5. The banding pattern of a persons DNA after being cut and run on gel is called






6. Term used to refer to an organism that has two different alleles for the same trait. e.g Tt is the heterozygous genotype for Tall.






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






8. 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.






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






10. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






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






12. Found only in that country






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






14. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






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






16. Organ no longer serves a function






17. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






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






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






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






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






22. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






23. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






24. Genes contain instructions for assembling






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






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






27. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






28. Determined the complete double helical structure of DNA






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






30. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






31. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






32. Chromosomes are collections of many






33. Because of base pairing in DNA the amount of






34. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






35. Different alleles for a gene






36. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






37. A change in the base sequence of a gene






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






39. A codon is made of...






40. DNA that is coiled around proteins






41. A body cell






42. The final product of transcription is...






43. Situation in which allele frequencies remain constant






44. The environmental factors that favour certain phenotypes






45. The comparison of the structures of different organisms






46. How often a particular gene occurs in the population






47. Identical alleles for a gene






48. Selection for the ability to obtain a mate






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






50. Copying the code from DNA onto mRNA