Gene deletion is a research area in genetics and molecular biology that involves the removal of specific genes from an organism's genome. This can be done using various techniques such as gene editing tools like CRISPR-Cas9 or gene knockout methods. By deleting specific genes, researchers can study the effects of their absence on the organism's phenotype and overall function. This research is crucial for understanding the roles of individual genes in various biological processes, as well as for investigating the potential therapeutic applications of gene editing technologies in treating genetic diseases.