How many mitotic divisions are needed for a single cell to make 128 cells?
  • a)
    7
  • b)
    14
  • c)
    28
  • d)
    32
Correct answer is option 'A'. Can you explain this answer?

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Answers

Soumya Yadav
Mar 11, 2020
As we know that, in mitotis each cell divides into two . So starting from single cell the increase of number will be as follows:
1->2->4->8->16->32->64->128
Thus total 7 division takes place starting from single cell or 2n times.

Vishal Kumar
Mar 26, 2020
Number of cells after 1 mitotic division=2=2^1

Number of cells after 2 mitotic divisions= 4=2^2

After 3 mitotic divisions=8=2^3

So number of cells after 'n' mitotic divisions= 2^n

So, 2^n=128=2^7

it means that 7 time

Vp Classes
Mar 04, 2022
Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. 
Hence the process of the division will be:
► 1 cell gives 2 daughter cells (1st mitosis)
► 2 cells give 4 daughter cells (2nd mitosis)
► 4 cells give 8 daughter cells (3rd mitosis)
► 8 cells give 16 daughter cells (4th mitosis)
► 16 cells give 32 daughter cells (5th mitosis)
► 32 cells give 64 daughter cells (6th mitosis)
► 64 cells give 128 daughter cells (7th mitosis)
Hence 7 mitotic divisions cell needed for a single cell to make 128 cells.

Tushar Mittal
Nov 08, 2021
Correct answers for the above question is 127
as formula is - (n-1)
if question has asked how many generation than the answer will be 7

Kaneez Fatma
Dec 29, 2021
In mitosis, a single cell divides to form two daughter cells.
1 → 2

2 → 4

4 → 8

8 → 16

16 → 32

32 → 64

64 → 128

or 2n cells. Where n is the number of divisions. Therefore, 7 mitotic divisions are required for a single cell to make 128 cells.

As we know that, in mitotis each cell divides into two . So starting from single cell the increase of number will be as follows:1->2->4->8->16->32->64->128Thus total 7 division takes place starting from single cell or 2n times.
As we know that, in mitotis each cell divides into two . So starting from single cell the increase of number will be as follows:1->2->4->8->16->32->64->128Thus total 7 division takes place starting from single cell or 2n times.