May 6, 2010
April 27, 2010
Short Answer Questions for AP Bio Test
ALL 3 OF THESE QUESTIONS WILL BE ON THE TEST ON THURSDAY.
Chapter 18 -
1. Compare the effect on the host cell of a lytic (virulent) phage and a lysogenic (temperate) phage. (this is from section 18.1)
2. Explain why the process of conjugation can lead to genetic recombination of chromosomal DNA in an Hfr x F- mating, but not in an F+ x F- mating. (see section 18.3)
Chapter 20
3. What is the major value of DNA microarray analysis for studying gene expression? (section 20.4).
April 21, 2010
Sordaria Life Cycle and Crossing Over
April 15, 2010
Hox genes video
April 11, 2010
April 6, 2010
Honors Biology - Biochemical Evidence for Evolution Lab.
1. Describe the purpose of the lab activity (in your own words). (1-2 sentences - 5 pts).
2. Describe the Nutall precipitation technique in your own words (4-5 sentences - 15 pts).
3. Why does a positive reaction (agglutination) suggest a high degree of relatedness? (5 pts)
4. Provide a phylogenetic tree of your results (indicating degree of relatedness between the species under investigation) (5 pts).
5. If you were to compare the DNA sequences of these 5 organisms, would you expect to obtain similar results in terms of their evolutionary relationships? Explain your answer. (10 points).
6. Aside from biochemical evidence (proteins/DNA), what other evidence can be used to determine evolutionary relationships between organisms? (5 points).
7. Distinguish between homologies and analogies and describe how convergent evolution can lead to false assumptions about evolutionary relatedness (10 points).
Please prepare typed responses to these questions. Due date - Tuesday 4/13/2010.
Short Answer Questions for AP Test
For the test on Thursday, one question from each of the 3 chapters will be in the short answer section. 10 points each. Feel free to consider responses ahead of time.
Chapter 15.
1. Describe the genetic relevance of a Barr body. Explain how X inactivation is related to the phenotype of a tortoiseshell cat.
2. Determine the sequence of genes along a chromosome based on the following recombination frequencies: A-B 8 map units, A-C 28 map units, A-D 25 map units, B-C 20 map units, B-D 33 map units.
Chapter 16
1. How did bacterial transformation occur in Griffith’s famous experiment?
2. What was the significance of the Meselson and Stahl experiment? What was the purpose of using 15N in their experiment?
Chapter 17.
1. Describe the structure and function of a promoter in a gene. What is the role of transcription factors?
2. There are 61 codons that specify amino acids, however there are only 45 tRNA’s. Explain how this is possible.