Unraveling the interplay of genetic variants and epigenetic signatures in complex traits.

Complex traits, characterized by their reliance on multiple genetic variants and intricate environmental influences, present a unique challenge in the field of genetics. At the core of complex traits lies the interaction between numerous genetic variants-often polygenic in nature-and their regulation through epigenetic mechanisms. These mechanisms, which include DNA methylation, histone modification, and non-coding RNA activity, play a crucial role in gene expression and can significantly influence phenotypic outcomes. By examining how genetic and epigenetic elements interact, we can gain insight into the biological processes that underlie variation in complex traits. Ultimately, this chapter seeks to provide a comprehensive framework for understanding the multifaceted relationships between genetic and epigenetic factors in complex traits. By unraveling these interactions, we hope to pave the way for future research that can inform strategies for improving health outcomes and clinical practices.