4、friendbasedontheirgenes.Thestudy also foundthatthegenesforsmellweresomethingsharedinfriendsbutnotgenesforimmunity.Whythissimilarityinolfactorygenesisdifficulttoexplain,fornow. 10,astheteamsuggests,itdrawsus 11similarenvironmentsbutthereismoretoit.Therecouldbemanymechanismsworkingintandemt