1. Which of the following molecules bridges DNA to protein? 

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?  

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

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? 

7. To say a mammalian gene is sex-linked typically implies that it?  

1.Sickle-cell anemia is a recessively inherited disorder.  If Stella is a carrier (heterozygote) of this disorder based on Mendel’s Law of Segregation she could produce which of the following gametes?  (use the letter S(s) to denote the sickle-cell alleles) 

5. Crossing over occurs during which phase of the cell cycle? 

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?  

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?

5. Sister chromatids of chromosomes are produced during which phase of The Cell Cycle?