The human genome contains
around 100.000 genes, distributed between the 23
pairs of chromosomes in a cell.
2) Exons -the protein coding part of the gene.
3) Introns -the non-coding part of the gene.
The basic idea is that a gene
serves as a recipe for a particular protein or in
some cases RNA. This is true in most cases, although
to make some proteins you need more than one recipe.
Like when you bake a cheesecake, you need one recipe
for the cake and one for the glazing.