Tag Archives | Eukaryotic

Role of Nucleolus in Production of Ribosomes | Genetics

In his article we will discuss about the role of nucleolus in production of  ribosomes (explained with diagram). The nucleolus is the site for rRNA transcription and processing as well as for assembly of ribosomal subunits. The nucleolus is organised at the nucleolus organising regions (NORs) of some chromosomes. These chromosomal regions contain the genes for 5.8S, 18S and 28S [...]

By |2016-12-12T07:24:35+00:00December 12, 2016|Ribosome|Comments Off on Role of Nucleolus in Production of Ribosomes | Genetics

Structure of Nucleosome | Genetics

In this article we will discuss about the structure of nucleosome. When chromatin or whole chromosomes are spread on an air-water interface and examined in the electron microscope, fibers 250 Å in diameter are observed. These are de-oxy-nucleoprotein fibres in which DNA is complexed with protein. Removal of proteins by various methods reveals the 10 nm fibre (1nm = 10 [...]

By |2016-12-12T07:24:35+00:00December 12, 2016|Genetics|Comments Off on Structure of Nucleosome | Genetics

Chromosome: Structure, Gene Sequence and Types | Genetics

In this article we will discuss about:- 1. Gross Structure of Chromosomes 2. Specific Gene Sequences in Chromosomes 3. Chromosome Banding 4. Synaptonemal Complex 5. Strandedness 6. Types of Specialised. Gross Structure of Chromosomes: The chromosome consists of two rod-like structures called chromatids joined with each other at the primary constriction or centromere. The portions of the chromatid on either [...]

By |2016-12-12T07:24:35+00:00December 12, 2016|Chromosomes|Comments Off on Chromosome: Structure, Gene Sequence and Types | Genetics
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