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. A body cell






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






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






4. Hybrid is sterile so biologically unfit






5. A mutation in which one nucleotide is replaced by another nucleotide






6. 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.






7. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






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






9. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






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






11. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






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






13. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






14. Organ that serves no useful function in an organism






15. Which structure contains anticodons






16. Translation occurs in the...






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






18. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






19. Periods of little adaptive change






20. An organism that has characteristics resulting from chromosomal alteration. This is a result of crossing over of the chromosomes during Meiosis - mutations and random segregation.






21. 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.






22. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






23. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






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






25. When zygote does not complete development or is physically weaker than normal






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






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






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






29. Mutation where an extra base is added






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






31. Transcrition occurs in the...






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






33. The comparison of the structures of different organisms






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






35. How often a particular gene occurs in the population






36. Change to a chromosome in which part of the chromosome is repeated






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






38. During transcription an RNA molecule is formed






39. A codon is made of...






40. Pea plants






41. Which type of Rna functions as a blue print of the genetic code






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






43. 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.






44. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






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






46. Dna moves during electrophoresis because of...






47. A limb with five digits (fingers)






48. The movement of individuals into an area






49. 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






50. Cross where you cross unknown genotype with a recessive