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






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






3. Types of rocks formed after exposure to very high heat. Because of the high temperatures - fossils are not able to be recovered from these types of rocks. Absolute or radioactive dating is possible - however.






4. DNA is made of...






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






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






7. Form of reproductive isolation in which structural differences in the anatomy of reproductive organs prevent sperm transfer between individuals of different species






8. 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.






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






10. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






11. The environmental factors that favour certain phenotypes






12. Features of different species tat are similar in function but not necessarily in structure and in which the similarity is not the result of common ancestry






13. A change or error in the DNA sequence






14. All the factors in an organism's surroundings that can potentially affect it






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






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






17. Era of recent life that began about 66 million years ago and continues today; includes the first appearance Hominids






18. Embryos of similar organisms have very similar early development indicating similar DNA at work






19. Synonym for protein; chain of amino acids






20. 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.






21. Proteins are made of...






22. 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






23. Building block of a protein






24. Used radioactive sulfur and radioactive phosphorus to determine that DNA is the genetic material - by demonstrating that it is DNA that is injected by bacteriophages into bacterial cells during infection






25. A change in the base sequence of a gene






26. Is active during transcription






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






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






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






30. T or F a codon consist of three nucleotides






31. One of the identical rods of a chromosome.






32. Chromosomes are collections of many






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






34. Different alleles for a gene






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






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






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






38. 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






39. Periods of little adaptive change






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






41. The complete genetic material contained in an individual






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






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






44. Movement of organisms ro of from a population






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






46. The independant evolution of similar traits - starting from a similar ancestral condition






47. Gradual evolution within a lineage






48. Individual that is heterozygous for two traits; shows the phenotype governed by the dominant alleles but carries the recessive alleles






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






50. Are noncoding sequences in the gene that are removed from RNA after transcription