Which substance is responsible for transfer of characters from one generation to another?

The substance responsible for the transfer of characters from one generation to another is DNA.

Explanation- The full form of DNA is Deoxyribo nucleic acid. DNA is the genetic material of the human beings that is passed one from one generation to another.

Additional information: DNA carries all the information of the body. It undergoes a process known as DNA copying. In this process, new strands of DNA are formed from the parent DNA. When the gamete formation takes place, the half of the DNA is copied in the gamete and through these gametes, the characters are transferred from one generation to another.