You have studied

mitosis in onion root
tip cells. It has 14
chromosomes in
each cell. Can you
tell how many
chromosomes will
the cell have at G1
phase, after S phase,
and after M phase?
Also, what will be the
DNA content of the
cells at G1, after S
and at G2, if the
content after M
phase is 2C?
pls answer fast

at G1 it will have 14 chromosomes

S also 14 chromosomes

G2 also 14 chromosomes

after M phase 7 chromosomes

The DNA content will be 2C at G1

and it will be 4C at G2 and S phase

  • -2

 oops sorry even after M phase it will be 14 chromosomes since mitosis is equational division

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 The chromosomes number will be 28 in G2 phase.

Please refer to this answer ignore the forst two.

at G1 it will have 14 chromosomes

S also 14 chromosomes

G2 28 chromosomes

after M phase 14 chromosomes

The DNA content will be 2C at G1

and it will be 4C at G2 and S phase

  • 2

 no it will be 28 in s phase

  • -1

where is the expert? pls ans my question fast?

  • 4

in s phase dna replication takes place but number of chromosomes remain same and so at the end of s phase 14 chromosomes are present not 28

  • -2
dna no never change in interphase... dna content double in s and g2 phase !! onion has 16 chromosome please visit new ncert book updated and edited!!
  • 0
After g1, s it will be 14. After m it will be 7
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DNA content after g1 will be 2c and 4c after s and g2
  • 2
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