Is a chromatin the same with the chromosome?

Question

I've learned that when the condensed chromosome uncoil and become extended again,it is called chromatin,why?what is the differences between them?

Answer 1

A chromosome is, minimally, a very long, continuous piece of DNA, which contains many genes, regulatory elements and other intervening nucleotide sequences. In the chromosomes of eukaryotes, the uncondensed DNA exists in a quasi-ordered structure inside the nucleus, where it wraps around histones (structural proteins, Fig. 1), and is called chromatin. During mitosis (nuclear division), the chromosomes are condensed and called metaphasic[?] chromosomes. This is the only state in which DNA is visible with an optical microscope. Prokaryotes do not possess histones or nuclei. In its relaxed state, the DNA can be accessed for transcription, regulation, and replication. Chromosomes were discovered by Karl von Naegli[?] in 1842. In 1910, Thomas Hunt Morgan proved chromosomes to be the carriers of genes.
Chromosomes in eukaryotes

1) Single DNA strand.
(2) Chromatin strand (DNA with histones).
(3) Condensed chromatin during interphase with centromere.
(4) Condensed chromatin during prophase.
(5) Chromosome during metaphase[?].

Answer 2

nope, definitely not. coz:
Chromatin is a complex of DNA and protein found inside the nuclei of eukaryotic cells. The nucleic acids are generally in the form of double-stranded DNA (a double helix). The major proteins involved in chromatin are histone proteins, but other chromosomal proteins are prominent too. DNA is packaged into chromatin thereby constraining the size of the molecule and allowing the cell to control expression of the chromatin-packaged genes. Changes in chromatin structure are affected mainly by methylation (DNA and proteins) and acetylation (proteins). Chromatin structure is also relevant to DNA replication and DNA repair.
while:
A chromosome is a large macromolecule into which DNA is normally packaged in a cell. Minimally, it is a very long, continuous piece of DNA (a single DNA molecule), which contains many genes, regulatory elements and other intervening nucleotide sequences.

in short, chromatin is just a strand of chromosome, including the histones and chromatids.

Answer 3

The tightly coiled DNA of the chromosome is generally considered inert with respect to DNA replication or protein production. The chromatin is wrapped around proteins called histones and then rewrapped around itself again and again, a handful of times. All this wrapping makes it unavailable for all the machinery needed to make proteins from it.

Answer 4

these are two different states of chromosome for easy differentiation.
Just like a tree, in it small state it was called plant but when it grow and take the big size it called tree.


And there is no other logic for that.

Answer 5

Chromatin is the stringy fibers of the chromosome, thew chrosome is when all the fibers are folded up.