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






2. Periods of rapid evolution punctuated by periods of little change






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






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






5. Different alleles for a gene






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






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






8. The formation of new species as a result of evolution






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






10. The backbone of DNA consist of...






11. 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.






12. Cross where you cross unknown genotype with a recessive






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






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






15. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






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






17. Building block of a protein






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






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






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






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






22. A change or error in the DNA sequence






23. Another name for a gene






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






25. 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






26. One of the identical rods of a chromosome.






27. A combining of genes or characters different from what they were in the parents






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






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






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






31. A unique combination of traits that are passed down from one generation to another.






32. The gradual changes in gene frequencies in a population due to random events






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






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






35. Trait where heterozygous is a blending of two alleles






36. An equilibrium in the occurence of two or more different froms within the same population usually caused by different allele combiinations of a gene






37. Closely related species occupying different habitats - niches preventing them from interbreeding






38. Gradual evolution within a lineage






39. Movement of alleles into or out of a population due to the migration of individuals to or from the population






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






41. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






42. Actual remains of an organism such as bones - teeth - shells - etc.






43. 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.






44. The gradual changes in gene frequencies in a population due to random events






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






46. Organism is preserved at very low temperatures. Preservation of both hard and soft parts can occur.






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






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






49. The specific location of a gene on a chromosome






50. What does DNA stand for...