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Biology 9 Online
OpenStudy (smartyprincess):

A weird question : How many cells do you suppose is in your body right now?

OpenStudy (smartyprincess):

@EclipsedStar @likeabossssssss

OpenStudy (smartyprincess):

Hi weird question lol

eclipsedstar (eclipsedstar):

It can't really be counted...since everyone's count is different xD However: "If scientists can’t count all the cells in a human body, how can they estimate it? The mean weight of a cell is 1 nanogram. For an adult man weighing 70 kilograms, simple arithmetic would lead us to conclude that that man has 70 trillion cells." http://phenomena.nationalgeographic.com/2013/10/23/how-many-cells-are-in-your-body/

OpenStudy (smartyprincess):

I know just wondering if you could make a guess for yuor age thank you though ;)

eclipsedstar (eclipsedstar):

I guess it depends on weight, not age. x'D

OpenStudy (smartyprincess):

It's actually not all that easy to answer that simple question. But recently, scientists have made a pretty good effort. And their final count is…37.2 trillion. Calculating the number of cells in the human body is tricky scource : http://www.smithsonianmag.com/smart-news/there-are-372-trillion-cells-in-your-body-4941473/

OpenStudy (smartyprincess):

yah i guess

likeabossssssss (likeabossssssss):

And their final count is…37.2 trillion. Calculating the number of cells in the human body is tricky. Part of the problem is that using different metrics gets you very different outcomes. Guessing based on volume gets you an estimate of 15 trillion cells; estimate by weight and you end up with 70 trillion http://www.smithsonianmag.com/smart-news/there-are-372-trillion-cells-in-your-body-4941473/

eclipsedstar (eclipsedstar):

Hmm...if they took the average, I suppose that would work out but the number of cells I have and a 1 month old baby would be different

OpenStudy (smartyprincess):

lol that is what I put allready

OpenStudy (smartyprincess):

yah well thanks this was just for fun to ask I do thought have a question on something else

OpenStudy (smartyprincess):

At what phase of mitosis does the number of chromosomes double?

eclipsedstar (eclipsedstar):

You mean when they're replicated?

OpenStudy (smartyprincess):

During what process in the cell cycle does one cell become two cells? I think this one is cytokinesis

OpenStudy (smartyprincess):

yah double is what this sheet says

likeabossssssss (likeabossssssss):

During S phase, which follows G1 phase, all of the chromosomes are replicated. Following replication, each chromosome now consists of two sister chromatids (see figure below). Thus, the amount of DNA in the cell has effectively doubled, even though the ploidy, or chromosome count, of the cell remains at 2n http://cyberbridge.mcb.harvard.edu/mitosis_4.html

likeabossssssss (likeabossssssss):

idk if that helps your not

eclipsedstar (eclipsedstar):

Google person ^ LOL

OpenStudy (smartyprincess):

I think the first question might be the interphase, that helps ;)

likeabossssssss (likeabossssssss):

yep star lol

OpenStudy (smartyprincess):

I'm not sure though because mitosis is mitosis but the chromosones double in tnerphase

OpenStudy (smartyprincess):

interphase is a sompletly different phase that happens before mitosis

eclipsedstar (eclipsedstar):

Well, it's because of the sister chromatids that make it confusing since they're similar

OpenStudy (smartyprincess):

so when the sister chromads duplicate when do they ?

eclipsedstar (eclipsedstar):

You mean when do they do so...?

OpenStudy (smartyprincess):

yes

eclipsedstar (eclipsedstar):

Well, the chromatids are actually located inside of the two separated chromosomes themselves, so it's simultaneously on the S phase

OpenStudy (smartyprincess):

ok thanks I gtg now Ill medal you

eclipsedstar (eclipsedstar):

I don't usually help out in Bio so this is tricky xD

OpenStudy (smartyprincess):

ok

eclipsedstar (eclipsedstar):

Thanks!

OpenStudy (smartyprincess):

ok bye

eclipsedstar (eclipsedstar):

Cya!

likeabossssssss (likeabossssssss):

have a good day :)

OpenStudy (smartyprincess):

you too! I found the right answer the Anaphase

likeabossssssss (likeabossssssss):

nice

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