Biology, asked by harshit279, 1 year ago

how chromatic network related to chromosomes

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Answered by ommritishkumar
3
The nucleoplasm contains many thread like structures known as nuclear reticulum and is made up of chromatin, it is also known as chromatin net or chromatin network. these thread like structures contain small granular bodies known as chromosomes. At the time of cell division chromatin net thickens and distinguishes into rod like structures known as chromosomes. Each chromosome remains in the form of chromatin network but actually consists of two parts known as Heterochroma tin and Euchromatin. Chromatin is made up of DNA and help in the transfer of heredity characters from one generation to another.
I hope now you understand relation between chromatin network and chromosomes.
Chromosomes are structures within the nuclei of eukaryotic cells that contain deoxyribonucleic acid (DNA) combined with proteins. Chromatin refers to the material of the chromosomes – DNA plus proteins. Before DNA replication, each chromosome contains a single, very long DNA molecule that basically runs from one end of the chromosome to the other. Core histone proteins package segments of this DNA molecule into nucleosomes, and linker histones further compact the resulting ‘string of beads’ into a 30‐nm chromatin fibre. In mitotic chromosomes, scaffold proteins fold the chromatin fibre into loops along its length. Chromosomes are very dynamic structures and take several forms, but the basic organisation is always related to the structure of mitotic chromosomes. The location of chromosomes in the nucleus, the nature of the loops and modifications to the chromatin fibre are thought to be important in determining which DNA sequences are made available for transcription and other processes.

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