Mendelian Genetics
The shared genetic and cellular features of all organisms, such as DNA and RNA as genetic carriers, ribosomes, the genetic code, and conserved metabolic pathways, provide strong evidence for the concept of common ancestry. Additionally, the inheritance of genes and traits, governed by Mendel's laws, explains how genetic variation is generated and passed on, influencing evolution and the continuity of life across generations. These concepts collectively reinforce our understanding of the interconnectedness of all living organisms.