Heredity and Evolution

Genes are the basic fundamental units of life. They are transferred from the parents to offsprings by a complex process. Ever wondered why we don't look exactly like our parents? Or why we don't look identical to our siblings? Also, we humans look way too different from our ancestors. Humans evolved from their ancestors through the process of evolution. But what is the process of evolution? We know fossils are studied on a larger scale to track down this ancestral history of an organism. But how do we know how old the fossils are? Let us seek the answers to these questions in this chapter.