There is no exclusive genes associated with male pattern baldness. Male pattern baldness is related to poor craniofacial development which due to genetic and environmental factors. Identical twins lose hair in the same way but they share the same environment from conception to late teens. Hair loss is so widespread in modern age because poor craniofacial development is huge problem of modern era. Even if your uncles, parents, grandparents etc. have good hair, you may lose it all because your scull development in worse way.
Craniofacial development is crucial to your posture and muscle action.
Poor posture leads to tighter neck muscles and then excessive mechanical tension on the galea and then scalp hypoxia and then hair loss.
The usage of bottles instead of breast feeding is the major cause of poorer craniofacial development.
Posture worsens with age among with skin thinning and reduced blood supply, and then we see more hair loss.
As I said I noticed that balding men have different craniofacial development compared to balding men.
Here's an example of good craniofacial development compared to poor one.
https://qph.fs.quoracdn.net/main-qimg-d794f3f8a60c04eb701b92b2681a2b03
I saw a lot of guys like the guy on the bottom pictures with hair loss who look like this.