system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Is the world full of minor mutants?

I'm assuming that their powers come from random mutations in their DNA. I don't know what the statistical distribution would look like, but we do know that there are all sorts of mutations from barely-noticeable to godlike. 

So wouldn't it stand to reason that there are mutations that are so subtle the person would never even realize they were a mutant? Would Cerebro be able to detect these people?
gpt
All mutants share a certain specific mutation called the X-Gene, and it's not necessarily random. It can also be hereditary.

Any expression of the X-gene leads to the potential for superhuman powers. Although the same hormones that start puberty usually start the manifestation of the X-gene, some people with the gene do not express a power at all, because another specific stimulus is needed to activate their powers and they never receive that stimulus. Once it is activated though, something superhuman will manifest in that person. 

It is suspected that unlike other genes, the X-gene is not subject to the whims of heredity, as it was programmed into the human genome by the Celestials, and is actually the normal state of a new species of human, Homo sapiens superior.

Cerebro can detect any human with the X-Gene, activated or not.