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






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






3. Innate trait; shared ancestry






4. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






5. 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






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






7. Another term for pure breeding






8. During transcription an RNA molecule is formed






9. 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.






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






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






12. Gradual evolution within a lineage






13. Cross where you cross unknown genotype with a recessive






14. 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






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






16. Recognize and cut DNA at specific sequences usually palindromes






17. A small simple structure (as a fertilized egg) from which new tissue can develop into a complete organism. It is also a cell






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






19. Used x ray cyrstallography to create an image of DNA






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






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






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






23. 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.






24. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






25. One of the types of fossils made from hardened tree resin. Preserves both hard and soft parts.






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






27. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






28. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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






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






31. A limb with five digits (fingers)






32. The offspring of a cross between two inbred lines within a single species. May also refer to the offspring of across between two species






33. Process by which one species gives rise to two or more species






34. T or F a codon consist of three nucleotides






35. How often a particular gene occurs in the population






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






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






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






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






40. When competition causes two closely related species to become more different in regions where their ranges overlap






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






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






43. A codon is made of...






44. 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.






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






46. 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.






47. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






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






49. Genes contain instructions for assembling






50. The specific location of a gene on a chromosome