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






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






3. Process in which DNA is duplicated






4. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






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






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






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






8. Separates DNA by size






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






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






11. Two alternative forms of a gene e.g Tall vs Short






12. Is active during transcription






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






14. 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.






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






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






17. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






18. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






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






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






21. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






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






23. A change in the base sequence of a gene






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






25. Earth's history organized into four eras: Precambrian - Paleozoic - Mesozoic - and Cenozoic






26. 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.






27. Pea plants






28. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






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






30. A trait that masks the expression of another trait






31. A nucleotide of RNA is made of...






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






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






34. Is found in DNA






35. The comparison of the structures of different organisms






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






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






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






39. Gene

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






41. Nucleotides that control which amino acids are added during protein synthesis






42. A change or error in the DNA sequence






43. The adaptive increase in pigmentation as a result of human - induced pollutants






44. Term used to refer to an organism that has two identical alleles for a particular trait. e.g TT is the homozygous genotype for Tall.






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






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






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






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






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






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