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






2. Cell division that produces reproductive cells or gamates.This occurs in the gonads (testicle and ovaries in animals) Here the chromosome number is halved the original amount. (each new cell has a haploid number = n) All daughter cells are not geneti






3. Type of sympatric speciation that occurs when a new species is formed because of a change in microhabitats






4. Hybrid is sterile so biologically unfit






5. 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






6. What does DNA stand for...






7. A population partially isolated from other populations of the same species






8. Change in a DNA sequence that affects genetic information






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






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






11. Different alleles for a gene






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






13. Form of reproductive isolation in which two populations reproduce at different times






14. Mating of an individual of unknown genotype but dominant phenotype w/ a homozygous recessive individual






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






16. T or F a codon consist of three nucleotides






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






18. 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






19. The environmental factors that favour certain phenotypes






20. Mutation where an extra base is added






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






22. Synonym for protein; chain of amino acids






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






24. The comparison of the structures of different organisms






25. Transcrition occurs in the...






26. The study of the past and present distribution of species.






27. A type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells






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






29. An episode of large - scale extinction affecting many different groups of organisms within a short period of time






30. A codon is made of...






31. Which structure contains anticodons






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






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






34. Identical alleles for a gene






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






36. Name for oism with one dominant and one recessive allele






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






38. Large - scale evolutionary changes that take place over long periods of time






39. The individuals choice of which mate they will choose. The choice is dependant on what traits the individual finds attractive. e.g some people will want their mates to be smart or pretty.






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






41. 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






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






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






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






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






46. Any agent that can cause a change in DNA






47. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






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






49. 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.






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







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