If you mean does it explain all morality, no, because some morality is based not on our biological imperatives, but are the result of culture and/or human thought. But yes, some of our instincts and drives due to our biology shape our notions of morality.
‘Human thought’, according to current science, is ‘ultimately’ void of any intelligent design. IOW, our human intellect and morality is ultimately the result of mindless events that unfolded without reason or purpose. To say ‘culture’ and ‘human thought’ adds to an equation void of design and is mindless says nothing as to how these anomalies actually exist as a result of and within a universe that is lacking any design or intelligence.