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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. It means chromosomes are paired. One of each chromosome in a pair originates from the father and one from the mother. They affect the same trait - but don't necessarily cause the same expression of the trait.






2. Gradual evolution within a lineage






3. Visual expression of a trait






4. Shows how the embryos of different groups resemble each other at particular stages. Similarities indicate groups may share a common ancestor






5. The preserved remains or traces of an organism that lived in the past






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






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






8. Transfer RNA; type of RNA that carries amino acids to the ribosome






9. Pea plants






10. The movement of individuals into an area






11. Another term for pure breeding






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






13. Process by which a ribosome uses the code on mRNA to make proteins






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






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






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






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






18. Group of individuals of the same species that live in the same area






19. 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






20. Process in which DNA is duplicated






21. Determined the concept of complementary base pairing






22. The specific location of a gene on a chromosome






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






24. Is active during transcription






25. Copying the code from DNA onto mRNA






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






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






28. Structure present in an organism however does NOT have a known function. May link organisms with similar vestigial structures. Example: appendix - coccyx bone - whale leg bones.






29. T or F a codon consist of three nucleotides






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






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






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






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






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






35. 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.






36. A change or error in the DNA sequence






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






38. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






39. Recognize and cut DNA at specific sequences usually palindromes






40. How often a form of a gene appears in a gene pool






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






42. Translation occurs in the...






43. How often a particular gene occurs in the population






44. Even if the gametes of the two species meet - fertilization does not occur






45. Predicts the possible outcome of a genetic cross.






46. Speciation preceded by a period of geographical isolation






47. What does DNA stand for...






48. Dna moves during electrophoresis because of...






49. Method of replication that implies that each new strand of DNA is half original and half new






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