Answer:
Inside the nucleoplasm a tangled mass of thread-like structures
is called chromatin. They are formed of an acid called Deoxyribonucleic Acid
(DNA) and proteins. When a cell starts to divide, the tangled mass of chromatin
condense into long threads and finally rod-like bodies called chromosomes.
The chromosomes contain stretches of DNA which carry information for
protein synthesis.
A gene is called the hereditary unit and DMA is called the
hereditary material,
A chromatic is one copy of duplicated chromosome which is
generally joined to the other copy by a centromere.
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