in the nucleus of an egg the amount of DNA is present=10Pg. Find the amount of DNA ehich will be present at the end of G2 phase of mitosis
Dear student
You question is not clear and seems wrong as the egg cell does not undergo mitosis after its formation. Instead, it fuses with sperm to form zygote. Then zygote cell undergoes mitosis. If you are asking about the amount of DNA in zygote or organism's cells formed from zygote, then answer is 40 pg. It includes 10 pg of egg + 10 pg of sperm ( i.e 20 pg in zygote) After S phase, the DNA doubles and hence at G2 phase, it will will be 40 pg.
However, as per question, the amount of DNA in egg cell with 10 pg DNA in nucleus, if it undergoes mitosis will be double i.e 20 pg in G2 phase. This is due to the reason, the replication of DNA takes place during S phase that occurs before G2 phase.
Hope this information clears your doubt about the topic.
Regards
You question is not clear and seems wrong as the egg cell does not undergo mitosis after its formation. Instead, it fuses with sperm to form zygote. Then zygote cell undergoes mitosis. If you are asking about the amount of DNA in zygote or organism's cells formed from zygote, then answer is 40 pg. It includes 10 pg of egg + 10 pg of sperm ( i.e 20 pg in zygote) After S phase, the DNA doubles and hence at G2 phase, it will will be 40 pg.
However, as per question, the amount of DNA in egg cell with 10 pg DNA in nucleus, if it undergoes mitosis will be double i.e 20 pg in G2 phase. This is due to the reason, the replication of DNA takes place during S phase that occurs before G2 phase.
Hope this information clears your doubt about the topic.
Regards