system
Given the following post, respond as if you're commenting on Reddit:
human
[MARVEL] Why is it some mutants manifest similar powers to their ancestors (the Summer's family, Daken) while others seemingly have nothing to do with their paternal mutant's abilities (the Maximoff twins, Legion)?
gpt
1. Mutations within the X-Gene.  Slight variations due to environmental factors such as exposure to radiation or certain chemicals can change the gene in the offspring so that it codes for other abilities.

2.  Interactions with other genes.  Variability in other areas of the genome could cause changes in the way the X-Gene expresses itself.

3.  Differences in the the womb.  It takes a living being to create a living being.  The mother's body provides a variety of chemical and hormonal signals to the developing fetus.  Changes in this environment can cause genes to be activated at different times or not at all.