Weird Chromosome number question

[299678]

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How many chromosomes are present in a homo sapiens somatic cell after the S phage of the cell cycle (# of haploid chromosomes are 23)?

-> they are asking how many chromosomes are present per cell, not total

Also could you correct the number below if it is wrong.

Mitosis

G1 46 chromosomes, 46 chromatids
S 46, 92
G2 46, 92

Prophage – 46, 92

Metaphage – 46, 92

Anaphage – 46, 46

Telophage – 46, 46,

 

[prsndwg]

How many chromosomes are present in a homo sapiens somatic cell after the S phage of the cell cycle (# of haploid chromosomes are 23)?

-> they are asking how many chromosomes are present per cell, not total
I think the answer is 46 chromosomes ( not sure of haploid or diploid of it)
Also could you correct the number below if it is wrong.

Mitosis

G1 46 chromosomes, 46 chromatids 23 chromosome, 46 chromotids
S 46, 92
G2 46, 92

Prophage – 46, 92 correct

Metaphage – 46, 92 correct

Anaphage – 46, 46 92 chromosome, 92 chromotids

Telophage – 46, 46 92 chromosome, 92 chromotids,

someone correct me if i am wrong.

 

[299678]

those number 92,92 are for total or per cell?

 

[bigstix808]

at the end of S phase there are 46 -somes and 92 -tids

(92 -somes do not become present until anaphase and before the completion of telophase)

 

[prsndwg]

those number 92,92 are for total or per cell?

i am not 100% sure but my logic says total.. 184 is too much for total!
my again not 100 percent sure

 

[Avery07]

i am not 100% sure but my logic says total.. 184 is too much for total!
my again not 100 percent sure

I think something is wrong.. I've been staring at it too long and can't think anymore.. Perhaps these will help--

 

[UCB05]

A chromosome is a single physical entity, whereas a chromatid is a single genetic unit of DNA. In interphase the somatic cell has 23 pairs of chromosomes, or 46 total. Each is a single entity, so there are 46 chromatids.

Upon replication, each of those 46 chromosomes now has a copy of itself BUT still attached. Therefore there are still only 46 chromosomes, but 92 distinct chromatids (46 sets of sister chromatids). This remains true through prophase and metaphase of mitosis.

In anaphase, each pair of sister chromatids physically separates. So now there are still 92 chromatids AND 92 physically distinct chromosomes migrating to opposite poles of the cell.

This 92/92 number remains true until the end of telophase, when two cells are formed, 46 chromosomes, 46 chromatids per cell.

 

[prsndwg]

A chromosome is a single physical entity, whereas a chromatid is a single genetic unit of DNA. In interphase the somatic cell has 23 pairs of chromosomes, or 46 total. Each is a single entity, so there are 46 chromatids.

Upon replication, each of those 46 chromosomes now has a copy of itself BUT still attached. Therefore there are still only 46 chromosomes, but 92 distinct chromatids (46 sets of sister chromatids). This remains true through prophase and metaphase of mitosis.

In anaphase, each pair of sister chromatids physically separates. So now there are still 92 chromatids AND 92 physically distinct chromosomes migrating to opposite poles of the cell.

This 92/92 number remains true until the end of telophase, when two cells are formed, 46 chromosomes, 46 chromatids per cell.

 

[299678]

Thank you all of you guys, finally I deeply understand the principle, still tricky though. I guess I need more education by trial and error for this concept