There is not actual change in the hereditary material when this phenotypic expression varies from one generation to the next.

They contain hereditary materials that ordain an organism's growth, development and traits.

At that time it was thought protein might be the hereditary material.

A mutation is a sudden change in hereditary material due to:

A unit of hereditary material, located on the chromosome.

Hershey and Chase concluded that protein was likely not to be the hereditary genetic material.

Soon after, cytologists (cell biologists) proposed that chromosomes were the hereditary material.

RNA performs many important roles in the cell, and is the hereditary material of some viruses.

All individuals have hereditary material in the form of genes that are received from their parents, then passed on to their offspring.

The light is destructive to DNA, the hereditary material, and to proteins.