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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. Deoxyribonucleic acid carries the genetic code for the proper functioning of an organism. It is composed of 5 carbon sugar (deoxyribose) four bases Adenine - Thymine - Cytosine and Guanine. the sugar is bonded to a phosphate group. This forms a long






2. Gene


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






4. A geographic gradient in the extent to which a character is developed in a species






5. The movement of genes between populations as a result of mating of migration






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






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






8. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






9. Change in a DNA sequence that affects genetic information






10. 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.






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






12. A point of overlap of paired chromatids at which fusion and exchange of genetic material (crossing over) occurs during prophase I of meiosis.






13. Genes contain instructions for assembling






14. When F1 is fully fertile but F2 has low fertility (rice - cotton)






15. Organ no longer serves a function






16. Determined the concept of complementary base pairing






17. A codon is made of...






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






19. An ancestor that two or more descendants have in common






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






21. Transcrition occurs in the...






22. Is found in DNA






23. Disappearance of a species from all parts of its geographical range






24. The signal on a mRNA molecule that designates the end of the coding sequence is called the...






25. Another name for a gene






26. 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






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






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






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






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






31. DNA that is coiled around proteins






32. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






33. Synonym for protein; chain of amino acids






34. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






35. The backbone of DNA consist of...






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






37. The final product of transcription is...






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






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






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






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






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






43. The study of the past and present distribution of species.






44. Is the genetic makeup of an organism (TT or Tt) ; All the combinations of genes you have for a certain trait.






45. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






46. Because of base pairing in DNA the amount of






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






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






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






50. 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.