[2026] PTE Academic Reading - Multiple Choice, Single Answer

Traditional genetics posits that our DNA is a fixed blueprint, an unchangeable script determined at conception. However, the emerging field of epigenetics suggests that environmental factors can influence gene expression without altering the underlying genetic code. Chemical tags, such as methyl groups, act as switches that turn specific genes on or off in response to factors like diet, stress, or toxins. This discovery challenges the historical dichotomy of nature versus nurture, revealing a dynamic interplay where lifestyle choices can physically manifest in our biology. Intriguingly, some studies suggest that these epigenetic modifications can be inherited, potentially passing the biological markers of trauma or malnutrition down to subsequent generations. While the prospect of intergenerational inheritance is profound, critics warn against deterministic interpretations that might lead to new forms of social stigmatization. They emphasize that epigenetic markers are often reversible, suggesting that positive environmental interventions can mitigate negative biological legacies. Ultimately, epigenetics empowers individuals with a sense of agency, while simultaneously highlighting the collective responsibility to provide healthy environments for all.