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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. These prevent fertilization between species e.g. diff breeding season - mating behaviour






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






3. Evolution of living things - based on evidence from the past and present.






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






5. Inherited feature that tends to prevent species from interbreeding with other species






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






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






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






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






10. 2 alleles for a character separate during the formation of gametes - so that each gamete only carriers one allele for each character

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






12. A trait that masks the expression of another trait






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






14. Independent segregation of genes during the formation of gametes






15. 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.






16. Is a sequence of DNA that codes for a protein and thus determines a trait. This is because the sequence of bases code for certain proteins.






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






18. Is a base found in DNA and RNA. This base pairs with Cytosine in DNA






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






20. T or F a codon consist of three nucleotides






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






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






23. 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.






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






25. Which structure contains anticodons






26. Innate trait; shared ancestry






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






28. Recognize and cut DNA at specific sequences usually palindromes






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






30. 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






31. What happens during the process of translation






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






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






34. In the event of a sperm fertilizing an egg of another species - mechanisms that prevent result being fruitful






35. Change of an organism over time. This can be caused by changes in in habitat or need to adapt for survival.






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






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






38. A change in the base sequence of a gene






39. The specific location of a gene on a chromosome






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






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






42. Organ no longer serves a function






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






44. Which type of Rna functions as a blue print of the genetic code






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






46. Determined the complete double helical structure of DNA






47. Ribosomal RNA; type of RNA that makes up part of the ribosome






48. Situation in which allele frequencies remain constant






49. The study relating the evolution of new charateristics to changes in the genes controlling development






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