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Laboratory Exam II Review 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. What is the difference between xylem and phloem? What color of the visible light spectrum is the least effective in photosynthesis (it is not absorbed)? What is paper chromatography? What is the basis of fractionation (there are 3 possible answer choices)? Which pigment acts as the reaction center molecule in photosynthesis? What is the difference between somatic and gametic cells? What do mitosis and mitosis have to do with these types of cells? What are the different phases of the cell cycle? What happens at each phase? Understand what an intermediate filament, microtubule and microfilament are. What is Recombination (crossing-over) of chromosomes? When does it take place in the cell cycle? What is tetraploid, diploid, haploid? What does this have to do with the cell cycle? A fruit fly somatic cell has 4 pairs of homologous chromosomes (chromosome 1, 2, 3 and 4). If there is no recombination, how many different gametes are possible after meiosis? Which organelle in the eukaryotic cell contains chromosomal DNA? What type of bond holds 2 polynucleotide (DNA) strands together? What are alternate forms of a gene called? Know how to apply Chargaff’s rules in calculating the percent ratios of aromatic bases in the DNA of a species. Understand dependent and independent assortment. What is linkage? What is the name of the protein responsible for untwisting and separating the two strands the DNA helix? What is the X chromosome? The Y chromosome? What is sex linkage? In eukaryotes, the process of transcription takes place in what organelle? Where does translation occur? If the mRNA sequence is 5’ AUGAAGGCAGGCCUGUUAUGA 3’, what is the anti-codon sequence of the tRNA encoding amino acid #4? What is a frame-shift mutation? A substitution mutation? Know the difference between complete or incomplete dominance. What is pleiotropy, epistasis, polygenics? What is the difference between autosomal or sex chromosomes? What is the sex chromosome in humans? 24. What is euploidy? What is aneupoloidy? 25. Know what Down Syndrome, Kleinfelters Syndrome and Turners Syndrome are. 26. What are Barr bodies? When are they present in the cell cycle. 27. What is a restriction enzyme? What do they do? 28. What is the charge of DNA when immersed in a basic medium? Why is the pH so important when performing gel electrophoresis? 29. A tube contains a mixture of DNA fragments of the following sizes: 4500bp, 2100bp, 800bp, 200bp. Which fragment would separate fastest in an agarose gel subjected to electroporesis? 30. What is the difference between genotype and phenotype? 31. Perform a mono-hybrid and di-hybrid cross (Punnet square). Predict the outcomes of the progeny (what do they look like)? 32. Be able to complete a human pedigree for sex-linked trait colorblindness.