1. Genetics: This refers to the organism's inherited genetic material, encoded in its DNA. Genes carry the instructions for building and maintaining an organism, influencing everything from physical appearance to susceptibility to diseases.
2. Environment: This encompasses all external factors that influence an organism's development and expression of its traits. This includes factors like nutrition, climate, exposure to toxins, social interactions, and even physical injuries.
These two factors interact constantly, with an organism's genetics setting the foundation for its potential traits, and the environment shaping how those traits develop and manifest.