Test your basic knowledge |

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. 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.






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






3. The preserved remains or traces of an organism that lived in the past






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






5. Features that are superficially similar but have different modes of development






6. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






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






8. How often a form of a gene appears in a gene pool






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






10. Mating of 2 oism that differ in 2 characters






11. The environmental factors that favour certain phenotypes






12. Actual remains of an organism such as bones - teeth - shells - etc.






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






14. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






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






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






17. Another term for pure breeding






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






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






20. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






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






22. Independent segregation of genes during the formation of gametes






23. What is one benefit for having two strands of DNA?






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






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






26. Translation occurs in the...






27. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






28. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






29. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






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






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






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






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






34. Mutation where an extra base is added






35. The region of the chromosome that holds the two sister chromatids together during mitosis






36. A base found in DNA (but not in RNA). This base pairs with Adenine.






37. Is active during transcription






38. Large - scale evolutionary changes that take place over long periods of time






39. A taxon originating from and including a single common ancestor






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






41. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






42. Selection against one end of a range of variation - resulting in a progressive change in allele frequency






43. During transcription an RNA molecule is formed






44. Proteins are made of...






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






46. Periods of little adaptive change






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






48. The gradual changes in gene frequencies in a population due to random events






49. When competition causes two closely related species to become more different in regions where their ranges overlap






50. Organ that serves no useful function in an organism