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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. 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






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






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






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






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






6. The movement of individuals into an area






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






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






9. Pea plants






10. Mating of 2 oism that differ in 2 characters






11. When a few individuals become isolated from a larger population - this smaller group may establish a new population whose gene pool is different from their source population.






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






13. Translation occurs in the...






14. What does DNA stand for...






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






16. Describes the existence of a prezygotic reproductive barrier between two species as a result of them occupying or breeding in different habitats within the same general geographical area






17. Dna moves during electrophoresis because of...






18. Gene

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19. Physical characteristics of an organism based on its genotype. e.g. Plant that has a genotype of TT will have a phenotype of Tall.






20. 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






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






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






23. A nucleotide of RNA is made of...






24. Movement of organisms ro of from a population






25. Periods of little adaptive change






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






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






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






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






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






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






32. The backbone of DNA consist of...






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






34. Is found in DNA






35. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






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






37. 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.






38. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






39. Because of base pairing in DNA the amount of






40. Speciation preceded by a period of geographical isolation






41. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






42. Transcrition occurs in the...






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






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






45. Organ that serves no useful function in an organism






46. Synonym for protein; chain of amino acids






47. Geologic period that followed the Precambrian;means 'ancient life' - early life (570-286 million years ago); single cell organisms - shells - mollusks - rise of first vertebrates - rise of land plants - amphibians - insects - seed plants - and trees






48. DNA is made of...






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






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







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