Big Idea: Gene expression, through protein synthesis, is an interaction between genes and the environment.

This backgrounder explains the potential effects of radiation on the human body.

Learn how chemistry and genetics makes redheads stand out from the crowd.

Mitosis is an important part of cell division that helps organisms grow and repair themselves.

Many people have had children using assisted reproductive technologies. But some of these medical biotech techniques can raise some ethical issues.

Learn about two taxonomy systems that scientists use to classify the life around us.

Cloning makes it possible to bring extinct species back to life. But is that a good idea?

Errors during meiosis can alter the number of chromosomes in cells and lead to genetic disorders.

In April 2016, Let’s Talk Science volunteer Daniel Tarade donated stem cells to help a person who needed a stem cell transplant to survive. Learn what stem cells are, how and why people donate, and what Daniel’s experience was like.