History
According to Damian Tryp, Homo Killcrop is a genetic predecessor to Homo superior. Also known as Changelings, Killcrops or Replacement People, this category of mutants possesses an X-Gene which manifests at birth instead of during adolescence. The evolutionary trait of delaying the onset of mutant powers helped more members of the species survive and proliferate.[1]
In centuries past most were murdered in infancy or even abandoned at birth. The remainder became scapegoats for poor harvests[1] and plagues.[2]
Eventually, the "change", the mutation was "buried until adolescence", ensuring the survival of the mutants, and leading to Homo superior.[1]
Changelings are still considered by most to be merely a subset of mutants, since several mutants in the modern era have manifested either all or part of their abilities at birth, but Damian Tryp presented changelings as a separate species. Seeing as how his motives were to convince Jamie Madrox's parents of his own personal ability to take care of their son as opposed to Professor X, he may have been disingenuous as to how large the differences between changelings and mutants are.[1]
It is still unknown by Steve Rogers if killcrops are in a separate genus from mutants, or a mutant subtype.[3]
Madrox was deemed to be a genetic throwback.[1]Powers and Abilities
Powers
Abilities
Average Strength Level
Weaknesses
Habitat
Habitat
Gravity
Atmosphere
Population
Miscellaneous
Level of Technology
Representatives
Allegedly Madrox and Damian Tryp.
Mutants activated at birth or Homo Killcrops[]
Henry McCoy is one those rare mutants whose mutations [...] were apparent at the earliest stages of his childhood. 
Many mutants have used their powers before their puberty, without a clear statement and the use of one of the terms for that (sub)species.
Tryp sort of stated that mutants didn't reveal themselves at birth, and opposed to the idea of exceptions,[1] making all the early activated mutants changelings in his perspective. With mutants such as En Sabah Nur, Charles Xavier, Kurt Wagner, etc., all activated mutants at birth born around or before Madrox, it is unsure why Tryp only classified Madrox as a Killcrop.Notes
See Also
- 58 appearance(s) of Killcrops (Mutants)
- 5 minor appearance(s) of Killcrops (Mutants)
- 12 representative(s) of Killcrops (Mutants)