● The `color{violet}"interphase nucleus"` has a loose and indistinct network of `color{violet}"nucleoprotein fibres"` called `color{Brown}"chromatin"`.
● But during different stages of `color{violet}"cell division"`, cells show `color{Brown}"structured chromosomes"` in place of the nucleus.
● `color{violet}"Chromatin"` contains `color{Brown}"DNA"` and some basic proteins called `color{Brown}"histones"`, some `color{violet}"non-histone proteins"` and also `color{Brown}"RNA"`.
● A single human cell has approximately `color{violet}"two metre long thread"` of DNA distributed among its `color{violet}"forty six"` (twenty three pairs) `color{violet}"chromosomes"`.
● Every chromosome essentially has a `color{violet}"primary constriction"` or the `color{Brown}"centromere"` on the sides of which `color{violet}"disc shaped structures"` called `color{Brown}"kinetochores"` are present.
● Based on the `color{Brown}"position of the centromere"`, the chromosomes can be classified into `color{Brown}"four type"`.
● `color{violet}"The Metacentric chromosome"` has `color{violet}"middle centromere"` forming `color{violet}"two equal arms"` of the chromosome.
● `color{Brown}"The sub-metacentric chromosome"` has `color{violet}"centromere nearer to one end"` of the chromosome resulting into `color{violet}"one shorter arm and one longer arm"`.
● In case of `color{Brown}"acrocentric chromosome"` the `color{violet}"centromere is situated"` `color{violet}"close to its end"` forming one extremely `color{violet}"short and one very long arm"`, whereas the `color{Brown}"telocentric chromosome"` has a `color{violet}"terminal centromere"`.
● Sometimes a few chromosomes have `color{violet}"non-staining secondary constriction"`s at a constant location.
● This gives the appearance of a `color{violet}"small fragment"` called the `color{Brown}"satellite"`.
● The `color{violet}"interphase nucleus"` has a loose and indistinct network of `color{violet}"nucleoprotein fibres"` called `color{Brown}"chromatin"`.
● But during different stages of `color{violet}"cell division"`, cells show `color{Brown}"structured chromosomes"` in place of the nucleus.
● `color{violet}"Chromatin"` contains `color{Brown}"DNA"` and some basic proteins called `color{Brown}"histones"`, some `color{violet}"non-histone proteins"` and also `color{Brown}"RNA"`.
● A single human cell has approximately `color{violet}"two metre long thread"` of DNA distributed among its `color{violet}"forty six"` (twenty three pairs) `color{violet}"chromosomes"`.
● Every chromosome essentially has a `color{violet}"primary constriction"` or the `color{Brown}"centromere"` on the sides of which `color{violet}"disc shaped structures"` called `color{Brown}"kinetochores"` are present.
● Based on the `color{Brown}"position of the centromere"`, the chromosomes can be classified into `color{Brown}"four type"`.
● `color{violet}"The Metacentric chromosome"` has `color{violet}"middle centromere"` forming `color{violet}"two equal arms"` of the chromosome.
● `color{Brown}"The sub-metacentric chromosome"` has `color{violet}"centromere nearer to one end"` of the chromosome resulting into `color{violet}"one shorter arm and one longer arm"`.
● In case of `color{Brown}"acrocentric chromosome"` the `color{violet}"centromere is situated"` `color{violet}"close to its end"` forming one extremely `color{violet}"short and one very long arm"`, whereas the `color{Brown}"telocentric chromosome"` has a `color{violet}"terminal centromere"`.
● Sometimes a few chromosomes have `color{violet}"non-staining secondary constriction"`s at a constant location.
● This gives the appearance of a `color{violet}"small fragment"` called the `color{Brown}"satellite"`.