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Gcse biology question(urgent!)
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Saad1679
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#1
Heres the question:
The screening technique is carried out on a cell from an embryo just after 3 cell divisions(mitosis) of the fertilised egg.How many cells will there be in an embryo after 3 cell divisions of the fertilised egg?
I know the answer is 8 but don't know how to work it out.
The screening technique is carried out on a cell from an embryo just after 3 cell divisions(mitosis) of the fertilised egg.How many cells will there be in an embryo after 3 cell divisions of the fertilised egg?
I know the answer is 8 but don't know how to work it out.
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Saad1679
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sortofmusician
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#3
Each mitotic division gives rise to two daughter cells (so the number of cells doubles with each division), so...
1 division = 2 cells
2 divisions = 4 cells
3 divisions = 8 cells
That's all there is to it as far as I can see!
1 division = 2 cells
2 divisions = 4 cells
3 divisions = 8 cells
That's all there is to it as far as I can see!
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Neuth
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#4
(Original post by Saad1679)
Anyone?
Anyone?
1 cell divides into 2. Then each of those 2 cells divides into 2. Then each of those 4 cells divides into 2.
Let's say 'O' represents a cell...
Division 1: O --> O + O
Division 2: O + O --> O + O + O + O
Division 3: O + O + O + O --> O + O + O + O + O + O + O + O
You're left with 8 cells, make sense?
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Saad1679
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#5
(Original post by Neuth)
During Mitosis, one cell divides into 2 identical daughter cells.
1 cell divides into 2. Then each of those 2 cells divides into 2. Then each of those 4 cells divides into 2.
Let's say 'O' represents a cell...
Division 1: O --> O + O
Division 2: O + O --> O + O + O + O
Division 3: O + O + O + O --> O + O + O + O + O + O + O + O
You're left with 8 cells, make sense?
During Mitosis, one cell divides into 2 identical daughter cells.
1 cell divides into 2. Then each of those 2 cells divides into 2. Then each of those 4 cells divides into 2.
Let's say 'O' represents a cell...
Division 1: O --> O + O
Division 2: O + O --> O + O + O + O
Division 3: O + O + O + O --> O + O + O + O + O + O + O + O
You're left with 8 cells, make sense?
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Dinasaurus
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#6
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