Chromatin

A complex of DNA and basic proteins (as histone) in eukaryotic cells that is condensed into chromosomes in mitosis and meiosis.  There are two types: heterochromatic which is densely coiled chromatin that appears as nodules in or along chromosomes and contains relatively few genes. Euchromatic is the less coiled and genetically active portion of chromatin that is largely composed of genes.

Related Topics:

Genetics

By permission. From Online Biology Book Glossary property of Prof. Michael Farabee