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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. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






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






3. Similar embryological structures in different species - such as gill slits - may demonstrate that these species share a common ancestor.






4. Layers of compressed sedimentary rock demonstrate the order or sequence at which events occurred. Cannot delineate the exact point of time - but is able to distinguish the order of events.






5. Innate trait; shared ancestry






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






7. How often a particular gene occurs in the population






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






9. Visual expression of a trait






10. 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.






11. Pea plants






12. Uses metamorphic or igneous rock - calculates the age of an object by assessing the amount of radioactive element still present in the organism. Radioactive elements are slowly lost over time because of decay.






13. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






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






15. Synonym for protein; chain of amino acids






16. Predicts the possible outcome of a genetic cross.






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






18. 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.






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






20. The movement of genes between populations as a result of mating of migration






21. To create a recombinant DNA molecule - one would have to first cut two DNAs with creating before pasting them together






22. Transcrition occurs in the...






23. Natural disaster eliminates most of the population - members left contribute the alleles for the new population.






24. 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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25. Heteros have a phenotype tintertmediate b/t phenotypes of the 2 homoz






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






27. The specific location of a gene on a chromosome






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






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






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






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






32. Two alternative forms of a gene e.g Tall vs Short






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






34. Impression made from a organism in soft material such as sand or mud.






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






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






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






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






39. A base found in DNA (but not in RNA). This base pairs with Adenine.






40. The adaptive increase in pigmentation as a result of human - induced pollutants






41. Consists of all genes - including all the different alleles - that are present in a population






42. The movement of individuals into an area






43. Separates DNA by size






44. Organisms with a similar underlying structure - but different function. Example: bird - bat and dolphin 'arm'. Shows a common ancestral link.






45. 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






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






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






48. The final product of transcription is...






49. The condition in which there is no change in allele frequencies from generation to generation (i.e. no evolution)






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