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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. Process in which DNA is duplicated






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






3. Is found in DNA






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






5. The sum total of an organism's requirements; its way of life






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






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






8. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. e.g. Tt plant will still be tall. Where T is the dominant trait for tall and t is the recessive trait for small.






9. When zygote does not complete development or is physically weaker than normal






10. During transcription an RNA molecule is formed






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






12. The comparison of the structures of different organisms






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






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






15. 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






16. Determined the complete double helical structure of DNA






17. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






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






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






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






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






22. Speciation preceded by a period of geographical isolation






23. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






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






25. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y






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






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






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






29. A trait that masks the expression of another trait






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






31. 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.






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






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






34. Mutation where an extra base is added






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






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






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






38. Describes a cell - nucleus - or organism that has only one set of unpaired chromosomes






39. Trait where heterozygous is a blending of two alleles






40. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






41. A limb with five digits (fingers)






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






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






44. Another name for a gene






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






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






47. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






48. How often a particular gene occurs in the population






49. Visual expression of a trait






50. Hybrid is sterile so biologically unfit