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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. DNA that is coiled around proteins






2. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






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






4. Determined the complete double helical structure of DNA






5. Found only in that country






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






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






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






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






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






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






12. T or F A cloned organism has the same proteins as another organism






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






14. 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.






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






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






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






18. The movement of individuals into an area






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






20. The comparison of the structures of different organisms






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






22. The structure on a tRNA molecule that allows it interact with an mRNA molecule






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






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






25. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks






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






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






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






29. Building block of a nucleic acid (DNA and RNA)






30. 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.






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






32. Change in a DNA sequence that affects genetic information






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






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






35. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






36. Hybrid is sterile so biologically unfit






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






38. Selection for the ability to obtain a mate






39. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






40. 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






41. Identical alleles for a gene






42. Process by which one species gives rise to two or more species






43. Copying the code from DNA onto mRNA






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






45. Evolutionary process in which a species or related species folllow different evolutionary paths to eventually become less related






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






47. 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.






48. Form of reproductive isolation in which two populations reproduce at different times






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






50. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.