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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. Determined the complete double helical structure of DNA






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






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






4. Change to a chromosome in which part of the chromosome is repeated






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






6. Change to a chromosome in which a fragment of the chromosome is removed






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






8. A genetic crosses that involve one trait. e.g TT plant crossed with tt plant has offspring who are heterozygous Tt.






9. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






10. 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.






11. 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






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






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






14. Innate trait; shared ancestry






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






16. T or F a codon consist of three nucleotides






17. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes. Mitosis involves growth and repair and occurs in the body cells.






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






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






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






21. Is active during transcription






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






23. Movement of organisms ro of from a population






24. Speciation which does not involve a period of geographical separation






25. Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome






26. DNA is made of...






27. A change in the base sequence of a gene






28. 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.






29. A group of organisms of the same species occupying a given area.






30. process in which homologous chromosomes exchange portions of their chromatids during meiosis.






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






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






33. Is found in DNA






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






35. The final product of transcription is...






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






37. During transcription an RNA molecule is formed






38. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






39. The movement of individuals into an area






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






41. Which structure contains anticodons






42. How often a particular gene occurs in the population






43. Human - like species that existed millions of years ago as witnessed through fossil evidence.






44. A distinct population of a species that varies from other populations of the same species.






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






46. Gradual evolution within a lineage






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






48. Separates DNA by size






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






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