How does DNA structure remain through a person’s life?

DNA structure is stable and does not change throughout a person's life. This stability is a fundamental characteristic of DNA, which serves as the genetic blueprint for an organism. While external factors such as environmental influences, lifestyle, and cellular processes can affect how genes are expressed, the actual sequence of DNA remains consistent from the time of conception until death.

DNA can undergo mutations, but these alterations are relatively rare and do not significantly impact the overall structure of the DNA itself. Most mutations are either benign or have no effect, while some may result in genetic disorders or contribute to evolution over long timescales. However, the core structure and sequence of an individual's DNA, which is inherited from their parents, remains unchanged.

The idea that DNA might change according to lifestyle or undergo frequent mutations does not accurately represent the biological principles governing DNA stability in a living organism. Additionally, while DNA may experience some modifications during a person's development, such as epigenetic changes, these modifications do not alter the fundamental DNA structure itself; they instead influence gene expression without changing the underlying sequence.