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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. Building block of a protein






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






3. Because of base pairing in DNA the amount of






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






5. The independant evolution of similar traits - starting from a similar ancestral condition






6. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






7. The comparison of the structures of different organisms






8. A group of organisms of the same species occupying a given area.






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






10. Process in which DNA is duplicated






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






12. Selection for the ability to obtain a mate






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






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






15. 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.






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






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






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






19. All the factors in an organism's surroundings that can potentially affect it






20. The number of times an allele appears in a population






21. Genes contain instructions for assembling






22. Found only in that country






23. Copying the code from DNA onto mRNA






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






25. 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






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






27. 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.






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






29. Name for oism with one dominant and one recessive allele






30. Proteins are made of...






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






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






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






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






35. Is a trait that is more expressed than another trait. Is written in capital letters for Genotype. E.g Tall genotype is TT or Tt where T is the allele for tall trait and t is the trait for small. T will be expressed more.






36. When F1 is fully fertile but F2 has low fertility (rice - cotton)






37. A base found in DNA (but not in RNA). This base pairs with Adenine.






38. How often a particular gene occurs in the population






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






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






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






42. A body cell






43. 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






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






45. A change or error in the DNA sequence






46. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






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






48. Any agent that can cause a change in DNA






49. Different alleles for a gene






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