* One Genome, Many Cells: You inherit a single set of genetic instructions (your genome) from your parents. This genome is contained within the DNA of every cell in your body.
* Identical Blueprint: The DNA in every cell of your body carries the same basic blueprint, containing all the genes that determine your traits.
* Cellular Specialization: While the DNA is the same, the way it's used (expressed) varies depending on the cell's function. For example, skin cells express genes that make them tough and protective, while brain cells express genes that allow them to communicate and process information.
* Exceptions: There are a few exceptions to this rule. Some cells, like immune cells, undergo a process called "somatic hypermutation" where their DNA can change slightly during development. This helps the immune system fight off a wider range of pathogens.
Therefore, while the DNA is essentially the same, the different ways in which genes are expressed in different cell types lead to the wide range of functions and structures found in the human body.
