n order to clone your female pet cat, which of the following individual component is an absolute requirement (means you MUST use the component and you do not have an option not to use it)?
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- In somatic cell nuclear transfer, the nucleus of a somatic cell is inserted into an enucleated egg. The resulting embryo is implanted into a surrogate mother. The nuclear genome of the resulting cloned animal will genetically identical to that of ["the original somatic cell", "the surrogate mother", "the enucleated egg"] , and the mitochondrial DNA of the cloned animal will be identical to that of ["the somatic cell", "the enucleated cell", "the surrogate mother"] . Pick answers within quotation marks to fill in the blanks.Evidence [see P. G. Shiels, A. J. Kind, K. H. Campbell, et al. (1999),“Analysis of telomere lengths in cloned sheep,” Nature 399, 316–317] suggests that Dolly may have been genetically older than heractual age. As mammals age, the chromosomes in somatic cells tendto shorten from the telomeres. Therefore, older individuals haveshorter chromosomes in their somatic cells than do younger ones.When researchers analyzed the chromosomes in the somatic cells of Dolly when she was about 3 years old, the lengths of her chromosomeswere consistent with those of a sheep that was significantlyolder, say, 9–10 years old. (Note: As described in the chapter, thesheep that donated the somatic cell that produced Dolly was 6 yearsold, and her mammary cells had been grown in culture for severalcell doublings before one of the cells was fused with an oocyte.)A. Suggest an explanation why Dolly’s chromosomes seemedolder than they should have been.B. Let’s suppose that a female sheep (like Dolly), which…. The position of the gene for the protein actin in the haploid fungus Neurospora is known from the complete genome sequence. If you had a slow-growing mutant thatyou suspected of being an actin mutant and you wantedto verify that it was one, would you (a) clone the mutantby using convenient restriction sites flanking the actingene and then sequence it or (b) amplify the mutantgene by using PCR and then sequence it?
- magine you are working in a lab that is developing a novelty rose that smells like a stinkhorn mushroom – called the “Grose.” The gene that produces the odorous protein has been isolated from stinkhorn and recombinant DNA containing this gene, a promoter, and a gene that confers resistance to the antibiotic ampicillin has already been produced.Explain two methods you could use to introduce the recombinant DNA into rose cells. (ie. transforming the rose cells)The following diagram shows one-half of a restriction site. (a) Draw the other half. GAC G I C (b) Use heavy arrows (↑1) to identify type II cleavage sites that would yield blunt-ended duplex DNA products. (c) Use light arrows (T1) to identify type II cleavage sites yielding staggered cuts that could be converted directly to recombinant DNA molecules by DNA ligase, with no other enzymes involved. (d) If this were the recognition site for a type I restriction endonu- clease, where would cutting of the duplex occur? (e) If DNA sequences were completely random, how large an inter- val (in kilobase pairs) would you expect between identical copies of this sequence in DNA?Your colleague wants to align the complete sequence of the collagen gene from humans to the homologous complete gene in rats. She can't decide if she should use the alignment program Needle or Water, and turns to you for help. Does it make a difference which program she uses, what advice would you give her?
- . Let’s say that you have incredible skill and can isolate the white and red patches of tissue from the Drosophila eyes shown in Figure 12-24 in order to isolate mRNA from each tissue preparation. Using your knowledge of DNA techniques from Chapter 10, design an experiment that would allow you to determine whether RNA is transcribed from the white gene in the red tissue or the whitetissue or both. If you need it, you have access to radioactive white-gene DNAIn 1997, Dolly the sheep was cloned by a technique called somatic-cell nuclear transfer (or nuclear-transfer cloning). A nucleus from an adult mammary cell was transferred into an egg from which the nucleus had been removed. The egg was allowed to divide several times in culture, then the embryo was transferred to a surrogate mother who gave birth to Dolly. Dolly died in 2003 after mating and giving birth herself to viable offspring. What does the creation of Dolly tell us about the potential of nuclear material derived from a fully differentiated adult cell? Does the creation of Dolly tell us anything about the potential of an intact, fully differentiated adult cell?Do a few cells created by therapeutic cloning of your own somatic cells constitute life? If these cells do constitute life, do they have the same rights as a human being conceived naturally? If it were possible, should someone be allowed to grow his or her own therapeutic clone into an adult?
- A). Briefly describe the function of telomerase. B). How does the structure of telomerase allow it to complete the function you described?several options can be correct Consider the following segment of DNA, which is part of a linear chromosome: LEFT 5’.…TGACTGACAGTC….3’ 3’.…ACTGACTGTCAG….5’ RIGHT During RNA transcription, this double-strand molecule is separated into two single strands from the right to the left and the RNA polymerase is also moving from the right to the left of the segment. Please select all the peptide sequence(s) that could be produced from the mRNA transcribed from this segment of DNA. (Hint: you need to use the genetic codon table to translate the determined mRNA sequence into peptide. Please be reminded that there are more than one reading frames.) Question 6 options: ...-Asp-Cys-Gln-Ser-... ...-Leu-Thr-Val-... ...-Thr-Val-Ser-... ...-Leu-Ser-Val-... ...-Met-Asp-Cys-Gln-...A method for detecting methylated CpGs involvesthe use of a chemical called bisulfite, which convertscytosine to uracil but leaves methylated cytosine untouched. You want to know whether a particularCpG dinucleotide at one location in the genome ismethylated on one or both strands in a tissue sample.The genomic sequence containing this CpG is:5’...TCCATCGCTGCA…3’. You take genomicDNA from the sample tissue, treat it exhaustivelywith bisulfite, and then use flanking primers toPCR-amplify the region including this CpGdinucleotide. You then want to Sanger sequence(see Fig. 9.7) the amplified PCR product. a. After you treat genomic DNA with bisulfite, the twoDNA strands will melt into single strands. 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 willnot amplify the DNA. What special considerationswould be necessary when you design your PCRprimers for this experiment? Could one pair…