What does it mean when a gene is said to be active?

A) That gene is expressed.
B) The gene contains DNA.
C) The gene is hereditary.
D) The gene is based on environmental influences.

Expressed

The act of conveying or revealing thoughts, feelings, or emotions verbally or through body language, often reflecting a personal or collective viewpoint.

Environmental Influences

The impacts of external factors from one's surrounding environment, such as society, culture, and physical surroundings, on an individual's behavior, decisions, and well-being.