Wrap 4: Please reply to the following discussion in a post forum, must be min of 50 words and not to exceed 80 words: This last week we learned about biodiversity and the impact businesses can have on the environment (good and bad).  Because we are losing species at such […]

Question 1 – In which we explore gene expression. A. Explain how differential gene expression yields a variety of cell types in a multi-cellular eukaryote. B. Explain how DNA is packaged into chromosomes. Explain how packing influences gene expression. C. Explain the process and significance of alternative DNA splicing. Question […]

Background: A geneticist discovers two genes that are involved in the cell cycle of C. elegans, a commonly used model organism. She studied the effects of these mutations in separate worm lines: aab+b+ and a+a+bb. to gain a better understanding of the cell cycle, she needs to create a double […]

In order to study transcriptional regulation and attenuation in the tryptophan operon, the UGG codons for tryptophan in the trp leader mRNA sequence were mutated into UUG codons. Using this altered trp operon, please answer the following questions. a) Under what conditions would the operon initiate transcription? b) Under what […]