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






2. 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.






3. Are noncoding sequences in the gene that are removed from RNA after transcription






4. Process in which DNA is duplicated






5. One of the identical rods of a chromosome.






6. Gene

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7. What is one benefit for having two strands of DNA?






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






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






10. 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






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






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






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






14. Mutation where an extra base is added






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






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






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






18. Pea plants






19. 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.






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






21. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






22. 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.






23. 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






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






25. Impression made from a organism in soft material such as sand or mud.






26. A trait that masks the expression of another trait






27. 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.






28. A process where the organisms that have traits that aid in its survival (adaptive traits) will reproduce to pass that trait to futher generations thus increasing the frequency of that trait in the population. Vice versa traits that reduce the chance






29. Another term for pure breeding






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






31. Is any chromosome that is not a sex chromosome.






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






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






34. The type of environment in which an organism or group normally lives or occurs






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






36. Human - like species that existed millions of years ago as witnessed through fossil evidence.






37. Form of reproductive isolation in which tere are differences in species courtship behavior






38. Speciation preceded by a period of geographical isolation






39. Which structure contains anticodons






40. Genes contain instructions for assembling






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






42. Found only in that country






43. Is active during transcription






44. Any agent that can cause a change in DNA






45. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






46. Speciation which does not involve a period of geographical separation






47. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






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






49. 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.






50. A pairing where the parent plants differ in only one character.







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