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






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






3. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






4. Any agent that can cause a change in DNA






5. Change in a DNA sequence that affects genetic information






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






7. 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






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






9. Recognize and cut DNA at specific sequences usually palindromes






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






11. A distinct population of a species that varies from other populations of the same species.






12. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






13. Group of similar organisms that can breed and produce fertile offspring






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






15. Hybrid is sterile so biologically unfit






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






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






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






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






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






21. 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.






22. Movement of organisms ro of from a population






23. 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.






24. Organ that serves no useful function in an organism






25. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






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






27. 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.






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






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






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






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






32. Determined the complete double helical structure of DNA






33. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






34. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






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






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






37. Mating of 2 oism that differ in 2 characters






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






39. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






40. Dna moves during electrophoresis because of...






41. Change in allele frequencies as a result of the migration of a small subgroup of a population






42. The specific location of a gene on a chromosome






43. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






44. 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






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






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






47. Method of replication that implies that each new strand of DNA is half original and half new






48. A limb with five digits (fingers)






49. One of the identical rods of a chromosome.






50. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful