How come these altruistic cells end up reproducing and favoring their offspring? I still see Dawkins's point as valid. Genes are responsible for some behaviour

How come these altruistic cells end up reproducing and favoring their offspring? I still see Dawkins's point as valid. Genes are responsible for some behaviours, they are certainly not EVERYTHING there is to human identity. Saying there is nothing in the DNA which gives us 5 fingers is incorrect. >Researchers in Chicago, Dr. Neil Shubin and his team, demonstrated that two genes -- hoxa13 and hoxd13 -- are responsible for the formation of fin rays and our fingers [...] >Yacine Kherdjemil demonstrated that by reproducing the fish-type regulation for the hoxa11 gene, mice develop up to seven digits per paw, i.e., a return to ancestral status. http://thescienceexplorer.com/nature/researchers-explain-how-evolution-has-equipped-our-hands-five-fingers http://thescienceexplorer.com/nature/researchers-explain-how...