DNA

[Dharmendra]

what will be the number of DNA after the meiosis and mitosis as compared to parent cell respectively

[JackBean]

Do you know, how mitosis and meiosis work? Or how are they also called?

[Dharmendra]

yes i do know about mitosis and meiosis ,i was told that mitosis is reductional division interm of DNA? is it true

[JackBean]

yes, that is true. Well, if you know, what happens, than you should be able to guess, what will be the amount of DNA afterwars, right?

[Dharmendra]

if i would know all that clearly why would i post topic in this forum if u know tell me clearly?

[JackBean]

What about to use the round thing on you neck?

If meiosis is the reductional division, which takes places e.g. when haploid gametes are formed from diploid somatic cells, what will happen with the DNA?
If mitosis takes places all around in your body (with the exeption of gamete production), what do you think happenes with DNA? Will the content change?

[muzna]

if u talk about man , there are 46 chromosomes in each cell, in somatic cells mitosis occur and chromosomes and obviously DNA numbers remain same,, but in reproductive cells due to meiosis its number become half i-e 23,, and after zygote formation it regain its original number i-e 46..

[JackBean]

if u talk about man , there are 46 chromosomes in each cell, in somatic cells mitosis occur and chromosomes and obviously DNA numbers remain same,, but in reproductive cells due to meiosis its number become half i-e 23,, and after zygote formation it regain its original number i-e 46..

Yeah, humans are all...

[Dharmendra]

no chaps .i think u haven't gone in detai about cell dicision or in brief cell cycle.when we go to cell cycle ,it contains interphase and m-phase.in interphase [s-phase]dna replicates so the no of dna becomes double.but these replicated and old dna [formed by semi-consevative model of watson and crick] remain attached to the centromere of the chromosome..............................................
so can we include interphase in mitosis or not?

[muzna]

no chaps .i think u haven't gone in detai about cell dicision or in brief cell cycle.when we go to cell cycle ,it contains interphase and m-phase.in interphase [s-phase]dna replicates so the no of dna becomes double.but these replicated and old dna [formed by semi-consevative model of watson and crick] remain attached to the centromere of the chromosome..............................................
so can we include interphase in mitosis or not?

........which during anaphase break and may separate................. during interphase cell prepare itself to divide, therefore it may double its dna amount and during division half of its dna may pass to daughter cell thus dna amount remain same,, meiosis is 2 phase division, before 1st phase there is interphase but no interphase can be found before 2nd phase, hence reduce dna to half.

[choozi]

isn't it better to study before questioning?