Briefly explain why CpG islands might have come to be underrepresented in eukaryotic genomes.

Can you please answer number 4

I recently isolated the human enzyme called fucosidase and prepared anantibody to it. Now I want to isolate a cDNA clone coding for this enzyme from a human cDNAlibrary. A friend of mine in the lab next door has informed me that he had recently isolated acDNA coding for dog fucosidase that I can use if I desire. In addition, I just read an article whichreported the sequence of the first 20 amino acids of human fucosidase. Which of the probeslisted below do you think I could use to screen my library to identify the cDNA clone containinghuman fucosidase?

RNA editing is a common process in the mitochondria of trypanosomes and plants as well as in chloroplasts, and in rare cases it occurs in higher eukaryotes. What is RNA editing, and what benefit does it demonstrate in the documented example of ApoB in humans?

DNA hypermethylation (an excess of methylation) is associated with many neurological disorders, including a potential role in Alzheimer's disease. a. When comparing individuals with and without Alzheimer's, which of the following 'omics techniques (exome sequencing, whole genome sequencing, transcriptomics, or proteomics) would you expect to be the most informative if your goal is to locate potentially causative methylation differences? Briefly justify your answer. b. The pdCas9-Tet1-CD enzyme (Xu et al Cell Discov. 2016) fuses an enzyme that can carry out cytosine demethylation to a mutant version of the CRISPR/Cas9 enzyme that localizes to DNA using a guide RNA in exactly the same manner as we discussed in class for standard Cas9, except that this version does not cut the genome. This demethylase enzyme can then act to remove DNA methylation proximal to where it is stably bound. Imagine that you have identified a gene that is hypermethylated specifically in patients with Alzheimer's…

What's the difference between moderately repetitive & highly repetitive sequences of eukaryotic sequences? Can someone give some examples of each?

The genome of Daphnia pulex, a small freshwater crustacean, includesapproximately 30,000 genes in ∼200,000 kb of DNA. How does the genome compare to that of Drosophila melanogaster, another arthropod, and to that of humans?

The occurrence of multiple transposons within the genome oforganisms has been suggested as a possible cause of chromosomalrearrangements such as deletions, translocations, and inversions.How could the occurrence of transposons promote these types ofstructural rearrangements?

Explain the Mutations at the Huntington disease locus are caused by an expansion of a trinucleotide repeat SSR in a coding region.

RNA polymerase I is insensitive to α-amanitin, RNA polymerase II is highly sensitive, and RNA polymerase III is moderately sensitive. These three RNA polymerases have different functions How might geneticists use α-amanitin as a tool in research? Propose a specific question that could be addressed using α-amanitin.