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






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






3. Visual expression of a trait






4. Separates DNA by size






5. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






6. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






7. Middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs - rise of flowering plants






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






9. Genes contain instructions for assembling






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






11. An ancestor that two or more descendants have in common






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






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






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






15. Pea plants






16. 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.






17. The final product of transcription is...






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






19. Innate trait; shared ancestry






20. Separation of species or populations so that they cannot interbreed and produce fertile offspring






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






22. Determined the concept of complementary base pairing






23. A limb with five digits (fingers)






24. Natural selection that causes the frequency of a particular allele to move in one direction






25. A body cell






26. 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.






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






28. Speciation preceded by a period of geographical isolation






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






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






31. 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






32. Any agent that can cause a change in DNA






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






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






35. Ribosomal RNA; type of RNA that makes up part of the ribosome






36. Breeding organisms with specific traits in order to produce offspring with identical traits






37. Mating of 2 oism that differ in 2 characters






38. A change in the base sequence of a gene






39. Dna moves during electrophoresis because of...






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






41. Periods of little adaptive change






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






43. Is active during transcription






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






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






46. A codon is made of...






47. How many codons are needed to specify three amino acids






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






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






50. Another name for a gene