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Section: Genetics » Physical Basis of Heredity » The Nucleus and the Chromosome
 
 
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  The nucleus
 
     
 
Content
⇒ Physical Basis of Heredity 1.  The Nucleus and the Chromosome
⇒ The Nucleus 
⇒ Significance of nucleus : Hammerling's experiment
⇒ Number, shape and size of nucleus
⇒ Nucleus in prokaryotes and eukaryotes
⇒ Nuclear envelope
⇒ Nuclear pore complex and nucleocytoplasmic traffic
⇒ Nucleolus
⇒ Chromosomes
⇒ Number, size and shape of chromosomes
⇒ Morphology of chromosomes
⇒ Karyotypes
⇒ Euchromatin and heterochromatin
⇒ Constitutive and facultative heterochromatin
⇒ Single-stranded and multi-stranded hypotheses for chromosomes
⇒ Chemical composition of chromosomes
⇒ Infrastructure of chromosomes
⇒ Function of chromosomes
⇒ Special types of chromosomes 
⇒ Lampbrush chromosomes
⇒ Salivary gland chromosomes
⇒ B-Chromosomes
⇒ Prokaryotic Nucleoids

Robert Brown for the first time in 1833 discovered a prominent body within the cell and termed it nucleus. A synonymous term for this organelle is the Greek word karyon. The nucleus can be called as the controlling centre of the cell, since it contains the chromosomes and the genes, which control all activities of an individual cell. The chromosomes which are present within the nucleus are responsible for deciding whether a fertilized egg will develop into a cow, a mango tree or into a man.
 
     






     
     
 
 
     
 
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