How are these characteristics transmitted from one
generation to the next It has been observed that nucleus of a living
cell is responsible for this transmission of inherent characters, also
called heredity The particles in nucleus of the cell, responsible for
heredity, are called chromosomes which are made up of proteins and
another type of biomolecules called nucleic acids These are mainly
of two types, the deoxyribonucleic acid (DNA) and ribonucleic acid
(RNA)