When a population of cells is examined with a microscope, thepercentage of the c

Question

When a population of cells is examined with a microscope, thepercentage of the cells in the M
phase is called the mitotic index. The greater the proportion ofcells that are dividing, the higher
the mitotic index. In a particular study, cells from a cell cultureare spread on a slide, preserved
and stained, and then inspected in the microscope. A hundred cellsare examined: 9 cells are in
prophase; 5 cells are in metaphase; 2 cells are in anaphase; 4cells are in telophase; the
remainder, 80 cells, are in interphase. Answer the followingquestions:

a. What is the mitotic index for this cell culture?

b. The average duration for the cell cycle in this culture is knownto be 20 hours.
What is the duration of interphase? Of metaphase?

c. Going back to the living culture of these cells, the averagequantity of DNA per
cell is measured. Of the cells in interphase, 50% contain 10 ng (1nanogram =
10-9 g) of DNA per cell; 20% contain 20 ng DNA per cell; theremaining 30% of
the interphase cells have amounts of DNA between 10 and 20 ng.Based on
these data, determine the duration of the G1, S, and G2 portions ofthe cell cycle.


DUE TOMORROW AT 12.00 PM

Explanation / Answer

No clue, If you don't get any answers please give me the karmapoints. PLEASE

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.