Epigenomics is a branch of genetics that focuses on studying the chemical modifications to DNA and histone proteins that can change the activity of genes without altering the underlying DNA sequence. These epigenetic modifications can influence gene expression, cell differentiation, and various cellular processes. Epigenomics research aims to understand how these modifications contribute to development, disease, and other biological processes, and how they can be targeted for therapeutic interventions. This field has significant implications for personalized medicine, as it can provide insights into individual differences in gene expression and disease susceptibility.