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8. Erwin Chargaff’s observations of DNA lead to the complimentary base pairing rules.  Based on what he proposed, if you find an organism w/ 14% Thymine in their DNA, what would you expect the other base amounts to be?

5. Which of the following is NOT a modification made to eukaryotic mRNA after it is created in transcription before it leaves the nucleus to be translated on a ribosome (ie. mRNA processing)?

3. Achondroplasia, a common form of dwarfism, is caused by a Dominant allele.  If 2 Heterozygotes for this trait were to mate, what % of their offspring will be normal height? 

5.  In the late 1950s, Meselson and Stahl grew bacteria in a medium containing heavy nitrogen (15N) and then transferred them to a medium containing lighter nitrogen (14N). Which of the results in figure below would be expected after one round of DNA replication in the presence of 14N?  

4. Considering the anti-parallel nature of the DNA double helix, if one strand of DNA read 5’ AATTGCCGT 3’ its complimentary DNA strand would read?  

5. Many times a single gene can affect multiple phenotypes. This is referred to as?

8.  Cytochalasin B is a chemical that interferes with Actin Microfilaments. Therefore, you would expect this chemical to interfere with which of the following cell processes?

4.  What would we call the two #12 chromosomes shown in the karyotype below? 

8. Roses exhibit incomplete dominance. If 2 pink heterozygous roses are allowed to breed, what ratio of phenotypes is expected in the offspring?

2. While observing Whitefish embryos in your virtual lab you notice that some of the cells of the embryo contained visible Chromosomes.  Because chromosomes were visible what process can you conclude was about to occur in these cells?