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






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






3. A model for the evolution of different froms over a long period of time but with only slight chchanges occring between successive generations






4. Proteins are made of...






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






6. Any agent that can cause a change in DNA






7. Is any chromosome that is not a sex chromosome.






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






9. Which structure contains anticodons






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






11. Separates DNA by size






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






13. Chromosomes are collections of many






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






15. Breeding organisms with specific traits in order to produce offspring with identical traits






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






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






18. Is the evolutionary process whereby a population becomes better suited to its habitat






19. Building block of a protein






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






21. Trait where heterozygous is a blending of two alleles






22. 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.






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






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






25. Organ that serves no useful function in an organism






26. Speciation preceded by a period of geographical isolation






27. 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.






28. T or F a codon consist of three nucleotides






29. Periods of little adaptive change






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






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






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






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






34. The movement of individuals into an area






35. A change or error in the DNA sequence






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






37. When zygote does not complete development or is physically weaker than normal






38. Copying the code from DNA onto mRNA






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






40. Change in a DNA sequence that affects genetic information






41. Condition in which an organism has extra sets of chromosomes






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






43. Pea plants






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






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






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






47. A type of barrier between species; the species remain isolated because male and femal gametes of the different species cannot fuse - or they die before they unite.






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






49. 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






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