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






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






3. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






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






5. Condition in which an organism has extra sets of chromosomes






6. Periods of rapid evolution punctuated by periods of little change






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






8. Is found in DNA






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






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






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






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






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






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






15. Relatively rapid proliferation from an ancestral type into new types which fill a diversity of ecological niches






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






17. Pea plants






18. Selection acting against the extremes of a range of variation - resulting in resistance to change in allele frequencies






19. Synonym for protein; chain of amino acids






20. Building block of a protein






21. The evolutionary history/geneology of a group of organisms (a tree thingy)






22. Evolution of living things - based on evidence from the past and present.






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






24. The movement of individuals into an area






25. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






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






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






28. Group of individuals of the same species that live in the same area






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






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






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






32. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






33. Speciation preceded by a period of geographical isolation






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






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






36. 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.






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






38. 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.






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






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






41. The banding pattern of a persons DNA after being cut and run on gel is called






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






43. The environmental factors that favour certain phenotypes






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






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






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






47. Transfer RNA; type of RNA that carries amino acids to the ribosome






48. How often a particular gene occurs in the population






49. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






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