There is no such general situation in real life where a 'kid' can directly 'kill' a 'gene' in the literal sense. Genes are part of our biological makeup and can be affected by various factors like mutations, environmental influences, and diseases, but not by a kid in a murderous way.
Typically, no. Genes are part of our genetic code and are influenced by things like inheritance, environmental factors, and random mutations. A kid isn't capable of causing harm to a gene in the sense of directly attacking or destroying it. While a kid's lifestyle choices in the future might influence gene expression, it's not the same as harming a gene in a traditional sense. So in a true story, it's very improbable.
In many true stories, the fate of a character like Gene could vary. Maybe it's a mystery that unfolds as the story progresses, or maybe it's clearly stated. But we need to know more details to be sure.
Yes. There are unfortunately some true stories where a child has committed a heinous act of killing a girl. For example, in some cases of extreme abuse or mental instability in a child, they may act out violently. However, such cases are extremely rare and often shock the community due to the unexpected nature of a child being involved in such a serious crime.