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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. A DNA double helix is held together in the center by between nitrogenous bases






2. Evolution of living things - based on evidence from the past and present.






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






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






5. Any agent that can cause a change in DNA






6. 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






7. Identical alleles for a gene






8. The backbone of DNA consist of...






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






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






11. A process that results in an allele having a different probability of remaining in the gene pool compared with that of another allele






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






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






14. The comparison of the structures of different organisms






15. Evolution resulting from small specific genetic changes that can lead to a new subspecies






16. 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.






17. An evolutionary 'branch' and its daughter 'twigs'






18. DNA that is coiled around proteins






19. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






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






21. 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.






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






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






24. What does DNA stand for...






25. The evolutionary history/geneology of a group of organisms (a tree thingy)






26. Organisms with similar functions - but different underlying structure. Example: bird and insect wing. These structures do NOT show a common ancestral link.






27. Populations that can interbreed with neighboring populations but not with populations separated by larger geographical distances






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






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






30. Selection for the ability to obtain a mate






31. Science dealing with DNA and protein synthesis of living organisms. Manipulation of DNA.






32. Found only in that country






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






34. 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.






35. Ribosomes are made of...






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






37. Embryos of similar organisms have very similar early development indicating similar DNA at work






38. Messenger RNA; type of RNA that carries instructions from DNA in the nucleus to the ribosome






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






40. The structure on a tRNA molecule that allows it interact with an mRNA molecule






41. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






42. All the factors in an organism's surroundings that can potentially affect it






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






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






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






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






47. 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.






48. Gene

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






50. Periods of little adaptive change