Being mentored by a knowledgeable and powerful mentor has been shown to be important for career advancement. However, when companies do not have a formal mentoring program in which people are assigned to a specific mentor, people are more likely to develop a mentoring relationship with someone who is similar to them in demographic traits. This can limit opportunities for employees who do not reflect the predominent demographic traits of the majority of the company's leaders. This is an example of:

Stereotyping

Similarity-Attraction Phenomenon

Ethnocentrism