The DNA present in an organism is made up of nucleic acid. This nucleic acid is the polymer that carries traits from one generation to another generation.
The nucleic acid has its functional unit gene. The genes responsible for a particular trait (character such as hair type, eye color, blood group)which is carried from parents to the children.
The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.
