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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. Translation occurs in the...






2. 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






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






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






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






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






7. Organ that serves no useful function in an organism






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






9. Copying the code from DNA onto mRNA






10. The sum total of an organism's requirements; its way of life






11. Describes the isolation of a physical barrier e.g. body of water (ocean) or mountains






12. Pea plants






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






14. Movement of alleles into or out of a population due to the migration of individuals to or from the population






15. A codon is made of...






16. Determined the complete double helical structure of DNA






17. Periods of little adaptive change






18. Another name for a gene






19. The specific location of a gene on a chromosome






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






21. A mutation in which one nucleotide is replaced by another nucleotide






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






23. Of a cell or organism having two sets of homologous chromosomes or twice the haploid number






24. DNA that is coiled around proteins






25. Any preserved remains of an organism from the past. Usually found in sedimentary rock.






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






27. 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.






28. The number of times an allele appears in a population






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






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






31. 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.






32. Innate trait; shared ancestry






33. Because of base pairing in DNA the amount of






34. shape of a DNA molecule formed when two twisted DNA strands are coiled into a springlike structure and held together by hydrogen bonds between the bases.






35. A trait that masks the expression of another trait






36. Type of rock made from small pieces of other rocks and organisms pressed together. Source of fossil preservation. Limited radioactive or absolute dating potential.






37. 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.






38. Process by which an organism is slowly turned to stone as the body is replaced by minerals.






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






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






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






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






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






44. Process by which one species gives rise to two or more species






45. Is found in DNA






46. 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.






47. Is active during transcription






48. What is one benefit for having two strands of DNA?






49. The reduction of a population - typically by a natural disaster - such that the surviving population is no longer genetically representative of the original population.






50. Chromosomes that determine the sex of an individual. These are X for female and Y for male. The female egg is an X while the male sperm can be X or Y