Please answer all the questions mitosis? 7. What is the significance of the line
ID: 209894 • Letter: P
Question
Please answer all the questions mitosis? 7. What is the significance of the line of duplicated chromosomes that forms at the cell's equator during metaphase of mi 8. What is cancer? 9. Growth factors are proteins that stimulate cell division. Examine the data in Table 5 TABLE 5 Cell Line Growth Conditions Behavior of Cells in Culture Dish No mitosis Nutrients Nutrients + growth factor Mitotic Nutrients Nutrients + growth factor No mitosis Nutrients Nutrients + growth factor Mitotic No mitosis Mitotic Which of the cell lines is likely cancerous? 10. Dioxin, a by-product of the production of vinyl, is known to cause damage to DNA in cells in culture. How would an epidem ologist determine whether dioxin is a carcinogen?Explanation / Answer
Answer 7.
Significance of line of duplication in metaphase (Mitosis) -
As at this point of time the chromosomes are duplicated in two sister chromatids, fully condensed, stop any movement for some time and alligned at the equator, so it is the time when one chromatid of each chromosome is available to be connected by its kinetochore to spindle fibers from both the opposite poles. Now this connection initiates the next phase (anaphase) where the spindle fibers attached to the kinetochores contract and pulls the sister chromatids apart and toward opposite poles of the cell.
In conclusion this line of duplication ensures the availability of two set of chromosomes where each will go to the new duplicated daughter cell.