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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. Determined the concept of complementary base pairing






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






3. The structure on a tRNA molecule that allows it interact with an mRNA molecule






4. Reciprocal evolution in two species as a result of the selection pressure each imposes upon the other






5. Organ no longer serves a function






6. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






7. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






8. A DNA double helix is held together in the center by between nitrogenous bases






9. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






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






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






12. 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.






13. Copying the code from DNA onto mRNA






14. A change in the base sequence of a gene






15. Determined the complete double helical structure of DNA






16. Movement of organisms ro of from a population






17. The evolutionary process by which a species becomes better suited to its niche.






18. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






19. What does DNA stand for...






20. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






21. 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






22. Speciation preceded by a period of geographical isolation






23. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






24. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






25. Gradual evolution within a lineage






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






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






28. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






29. T or F a codon consist of three nucleotides






30. 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.






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






32. A change or error in the DNA sequence






33. Embryos of similar organisms have very similar early development indicating similar DNA at work






34. Pea plants






35. Building block of a nucleic acid (DNA and RNA)






36. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






37. A body cell






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






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






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






41. Synonym for protein; chain of amino acids






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






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






44. Any agent that can cause a change in DNA






45. Evolution of the earth - which is hypothesized to have been formed over 4.6 billion years ago.






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






47. Is a base found in DNA and RNA. In DNA its partner is Thymine. In RNA its partner is Uracil






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






49. Periods of little adaptive change






50. Is found in DNA