Question

what is Gene?How it's work

Answer 1

Each gene has a special job to do. The DNA in a gene spells outspecific instructions—much like in a cookbook recipe — for making proteins (say: PRO-teens) in the cell. Proteins are the building blocks for everything in your body. Bones and teeth, hair and earlobes, muscles and blood, are all made up of proteins

Answer 2

gene is the structural and function unit of DNA ..
it inherited from parents to its progeny 

and transfer the characters to progeny