Hereditary conditions cannot be changed because they are determined by the genetic information inherited from parents, encoded in the DNA within sperm and egg cells. These genetic codes contain instructions that shape biological functions and physical traits. Since these instructions are fixed at conception and present in every cell, altering hereditary conditions would require changing the underlying genetic sequence, which is currently not possible with existing medical methods except in very limited cases like gene therapy for some disorders. Environmental factors and lifestyle can influence how some hereditary conditions manifest, but they do not change the genetic code itself.

Why hereditary conditions cannot be changed

• Hereditary conditions result from mutations or variations in genes that are passed down through reproductive cells (egg and sperm). These genetic instructions are stable and present in all cells from birth, so the condition is embedded in the individual's biology.
• Mutations that happen during a person's lifetime, known as somatic mutations, only affect certain cells and are not inherited, unlike germline mutations responsible for hereditary diseases.
• Most medical treatments manage symptoms rather than change the underlying genetic mutation, except rare gene therapy cases targeting specific disorders.

Genetic inheritance and stability

• Genes come in pairs, one from each parent, and the inheritance pattern (dominant, recessive, etc.) determines disease manifestation.
• The genetic code is remarkably stable to maintain organism function, so changing it would require complex, precise alterations across many cells, which current science cannot universally achieve.

Role of environment and gene expression

• Environmental factors and lifestyle can impact gene expression (epigenetics), influencing how strongly a hereditary condition shows up, but these changes do not alter the DNA sequence itself.
• Researchers are exploring epigenetic influences but changing the genetic mutation that causes the condition remains out of reach.

Thus, hereditary conditions are fundamentally unchangeable because they are encoded in the fixed DNA sequence inherited from parents.