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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 codon is made of...






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






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






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






5. Visual expression of a trait






6. The complete genetic material contained in an individual






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






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






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






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






11. 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.






12. Selection acting against the middle of a range of variation






13. Hybrid is sterile so biologically unfit






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






15. Is active during transcription






16. A population partially isolated from other populations of the same species






17. Mating of 2 oism that differ in 2 characters






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






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






20. Separates DNA by size






21. Another name for a gene






22. A copy of a gene is made during a process called this






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






24. Three mRNA nucleotides that code for a specific amino acid






25. Ribosomes are made of...






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






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






28. Speciation preceded by a period of geographical isolation






29. The environmental factors that favour certain phenotypes






30. 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






31. How often a particular gene occurs in the population






32. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






33. Change in a DNA sequence that affects genetic information






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






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






36. Is found in DNA






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






38. 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.






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






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






41. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






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






43. Situation in which allele frequencies remain constant






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






45. Process in which DNA is duplicated






46. Transcrition occurs in the...






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






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






49. Trait where heterozygous is a blending of two alleles






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







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Can you answer 50 questions in 15 minutes?


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