Explain with the help of suitable examples why certain traits cannot be passed on to the next generation? What are such traits called?

Explanation

A trait (or characteristic) of an organism which is 'not inherited' but develops in response to the environment is called an acquired trait.
The acquired traits of an organism cannot be passed on to its future generations.
For example, 'low weight' of beetle, 'cut tail' of a mouse.
Changes brought in the non-reproductive tissues cannot be passed on to the DNA of the germ cells. So the experiences of an individual during its lifetime cannot be passed on to its progeny. Thus acquired characters of an individual cannot be inherited.