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Do chromosomes make up DNA or contain DNA? If it does contain DNA, how does 46 chromosomes make up the 220 different somatic cells with different functions?
46 =/= 220, because doesn't each different somatic cell have different DNA(double helix)?
How does this work?

Answer 1:

Chromosomes are strands of DNA bundled by proteins called histones.

All cells contain the entire genome of the organism they belong to (human cells have 46 chromosomes, but different species of animals and plants have different numbers). Every one of your 220 cell types still contains all of your DNA. Different cell types do not contain different DNA (note: they don't in nematodes, but that's another story).



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