A eukaryotic cell has millions
of base pairs of DNA that it must keep organized. During cell
division, all of the DNA in a cell is replicated and segregated to
the daughter cells. In order to keep the DNA organized, DNA is
packaged into manageable pieces called chromosomes.
In this Lesson, we'll discuss
the packaging of DNA in eukaryotic cells and see how it affects gene
The levels of DNA packaging
provide a mechanism for regulating transcription. DNA that contains
many genes is not packaged as tightly as DNA that contains few
genes, so it's more accessible for transcription.