The concept of natural selection originally developed in the absence of a valid theory of heredity; at the time of Darwin's writing, science had yet to develop modern theories of genetics.
Isim wan nefran wan batil efes net wan alasal ijja ɣur iban mirda n etari fal tijja taridawt ; daɣ azzaman wan akatab wan Darwin, science ilzam tat efes n mirda tan eynaynen n genetics