1.regarding the Ty2 strain of S. typhi, about how many more bacteria were able t
ID: 174362 • Letter: 1
Question
1.regarding the Ty2 strain of S. typhi, about how many more bacteria were able to enter normal cells (those expressing unmutated CTFR) than cells expressing the gene with the CF mutation?
2. Which strain of bacteria entered normal epithelial cells most easily?
3.Entry of all three S. typhi strains into the heterozygous epithelial cells inhibited. Is it possible to tell from this graph which strain was most inhibited?
1. what percentage of mouse oocytes displayed abnormalities of meiosis with no exposure to damaged caging?
2.Which group of mice had the most meiotic abnormalities?
3.what is abnormal about metaphase 1 as it is occurring in the oocytes shown in figure 8.16B, C, and D?
1.What is the chromosome number of the HeLa cell?
2.How many extra chromosomes does this cell have, compared with a normal human body cell?
3. Can you tell that this cell came from a female? How?
PATTERNS OF INHERITANCE CHAPTER 9 157 106 O Normal cells Cells heterozygous for the CF allele 105 a co E 2 E 104 167 Ty2 7251 Strain of Salmonella typhi Effect of the CF mutation on uptake of three Figure 9.11 strains of Salmonella typhi bacteria by epithelial cells. 1. Regarding the Ty2 strain of S. typhi, about how many more bacteria were able to enter normal cells (those expressing unmutated CFTR) than cells expressing the gene with the CF mutation? 2. Which strain of bacteria entered normal epithelial cells most easily? n ratnu of all three S tunhi strains into the heterozyExplanation / Answer
Almost half of the cells are bacteria were able to enter normal cells. Ty2 strain of bacteria has entered I normal epithelial cells, since the uptake or number of CUF is much larger than other strains. According to graph basing on the CUF number we can derive that strain 167 is most inhibited
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