ND STONY BROOK UNIVERSITY LOOSELEAF GENETICS: FROM GENES TO GENOMES
6th Edition
ISBN: 9781260406092
Author: HARTWELL, Leland, HOOD, Leroy, Goldberg, Michael
Publisher: Mcgraw-hill Education/stony Brook University
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Chapter 17, Problem 27P
A method for detecting methylated CpGs involves the use of a chemical called bisulfite, which converts cytosine to uracil but leaves methylated cytosine untouched. You want to know whether a particular CpG dinucleotide at one location in the genome is methylated on one or both strands in a tissue sample. The genomic sequence containing this CpG is: 5’...TCCATCGCTGCA…3’. You take genomic DNA from the sample tissue, treat it exhaustively with bisulfite, and then use flanking primers to PCR-amplify the region including this CpG dinucleotide. You then want to Sanger sequence (see Fig. 9.7) the amplified PCR product.
| a. | After you treat genomic DNA with bisulfite, the two DNA strands will melt into single strands. Page 615 Why? |
| b. | Your answer to part (a) introduces a potential complication, because if you do not account for this result of bisulfite treatment, the PCR primers will not amplify the DNA. What special considerations would be necessary when you design your PCR primers for this experiment? Could one pair of PCR primers amplify both strands of DNA? |
| c. | What sequence would you see if you amplified the DNA strand shown and the CpG was methylated? If it was not methylated? |
| d. | Using the bisulfite method, can you tell if this CpG dinucleotide in the tissue sample is hemimethylated (methylated on one strand) or methylated on both strands? Explain. |
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Chapter 17 Solutions
ND STONY BROOK UNIVERSITY LOOSELEAF GENETICS: FROM GENES TO GENOMES
Ch. 17 - For each of the terms in the left column, choose...Ch. 17 - For each of the following types of gene...Ch. 17 - List five events other than transcription...Ch. 17 - Which eukaryotic RNA polymerase RNA pol I, pol II,...Ch. 17 - As shown in the following diagram, a single...Ch. 17 - You have synthesized an enhancerless GFP reporter...Ch. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - A single UAS regulates the expression of three...Ch. 17 - MyoD is a transcriptional activator that turns on...
Ch. 17 - a. Assume that two transcription factors are...Ch. 17 - Prob. 12PCh. 17 - In Problem 12, you identified a genomic region...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Genes in both prokaryotes and eukaryotes are...Ch. 17 - Prob. 17PCh. 17 - Lysine 4 of histone H3 H3K4 is methylated in the...Ch. 17 - J.T. Lis and collaborators have developed an...Ch. 17 - Hydatiform moles are growths of undifferentiated...Ch. 17 - Prader-Willi syndrome is caused by a mutation in...Ch. 17 - The human IGF2 gene is autosomal and maternally...Ch. 17 - Follow the expression of a paternally imprinted...Ch. 17 - Reciprocal crosses were performed using two inbred...Ch. 17 - Interestingly, imprinting can be tissue-specific....Ch. 17 - Prob. 26PCh. 17 - A method for detecting methylated CpGs involves...Ch. 17 - Honeybees Apis mellifera provide a striking...Ch. 17 - Consider the experiment in Fig. 17.24, where the...Ch. 17 - A protein or RNA that regulates gene expression in...Ch. 17 - a. How can a single eukaryotic gene give rise to...Ch. 17 - A hunchback gene, a gene necessary for proper...Ch. 17 - You know that the mRNA and protein produced by a...Ch. 17 - You are studying a transgenic mouse strain that...Ch. 17 - Prob. 35PCh. 17 - Scientists have exploited the siRNA pathway to...Ch. 17 - Persimmons Diospyros lotus are dioecious plants,...Ch. 17 - Drosophila females homozygous for loss-of-function...Ch. 17 - The text has discussed the RNA-Seq technique,...Ch. 17 - Researchers know that Fru-M controls male sexual...Ch. 17 - The Drosophila gene Sex lethal Sxl is deserving of...Ch. 17 - Figure 17.29 shows that the Sxl protein binds to...
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