thw answer you are looking for is either DNA or Nucleus
cell wall
chromosomes
Cells
no
genes
The structures are called chromosomes.
chromosome
chromosomes
Chromosomes
Cells
no
genes
nucleus
It is called a differentiation
DNA, deoxyribonucleic acid, is the structure that contains the genes.
The genome contains several genes, all of which do not have to be switched on simultaneously. When a cell has to become specialized, it has to switch on certain genes and switch off the transcription of others. This mechanism of keeping a check on the genes being expressed at any point of time is referred to as gene regulation. A neuron, for example, will have a certain set of genes switched on, which is different from the genes switched on my a sarcomere (muscle cell). Gene expression dictates the properties and characteristics of specialized cells in the body
There are three parts. A pentose sugar,phosphate group and a nitrogenous base.
Genes or locus.