Approximately how many nucleosomes would you expect to find in one of your nuclei? (Assume the...

Question

Question

Approximately how many nucleosomes would you expect to find in one of your nuclei? (Assume the cell is in G1)

Answer 1

Answer #1

A single non-replicated chromosome i.e equal to one chromatid = 1 DNA molecule

A replicated chromosome i.e equal to 2 chromatids (aka sister chromatid) = 2 DNA molecules

Therefore a cell in G1 phase the cell would effectively have 46 molecules of chromosomes and 92 DNA molecules in each nuclei.

A diploid human cell has approximately 6.4 billion base pairs of DNA.

If one nuleosome appears every 200bp of DNA, so in a diploid DNA with 6.4billion bases,

the number of nucleosomes will be = 6.4billion/200

= 32 million.

Answer 2

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