Genetics:
* MC1R gene: This gene plays a key role in hair color. People with red hair have specific variations in the MC1R gene that lead to the production of a reddish pigment called pheomelanin instead of the dark pigment eumelanin.
* Other genes: While the MC1R gene is crucial, other genes can influence the specific shade of red hair, its intensity, and even how it changes with age.
Phenotype (Physical Appearance):
* Hair color: True redheads typically have hair ranging from strawberry blonde to fiery copper to deep auburn. There is a spectrum of red hues, with some having more orange tones and others more brown tones.
* Skin tone: Many redheads have fair skin that is prone to freckles and sunburns. However, there are redheads with olive skin tones as well.
* Eye color: Eye color is not directly related to red hair, but redheads often have blue, green, or hazel eyes.
Cultural Perception:
* Subjectivity: What constitutes a "true redhead" can be subjective. Some people might consider anyone with even a hint of red in their hair to be a redhead, while others might have a stricter definition.
* Social construction: The concept of "redhead" is also influenced by cultural norms and stereotypes.
Therefore, it's best to avoid rigid definitions and embrace the diversity of redheads. A person can be a true redhead regardless of the precise shade of their hair, their skin tone, or their eye color. Ultimately, what matters is how someone identifies themselves.