▁he ▁graduated ▁with ▁a ▁ 1 st ▁Class ▁Hon ours ▁in ▁Zo ology , ▁and ▁later ▁completed ▁his ▁Ph D ▁on ▁rib os ome / m essen ger ▁R NA ▁specific ity . ▁Following ▁the ▁completion ▁of ▁his ▁doctor ate , ▁Norman ▁spent ▁a ▁year ▁at ▁Rock ef eller ▁University , ▁New ▁York ▁as ▁a ▁Sir ▁Henry ▁Well come ▁fellow . ▁ ▁Mac lean ▁married ▁Jean ▁Kay ▁Smith ▁in ▁ 1 9 6 2 . ▁Jean ▁has ▁worked ▁as ▁a ▁medical ▁general ▁pract ition er ▁for ▁most ▁of ▁her ▁married ▁life , ▁and ▁together ▁they ▁have ▁two ▁children ; ▁Lor na , ▁born ▁in ▁ 1 9 6 5 , ▁and ▁G av in ▁born ▁in ▁ 1 9 6 7 ▁ ▁Although ▁re ared ▁in ▁a ▁Protest ant ▁sect ▁called ▁the ▁' Ex clus ive ▁Bre th ren '; ▁Mac lean ▁is ▁an ▁active ▁member ▁of ▁Human ists ▁UK ▁and ▁currently ▁serves ▁as ▁a ▁chair ▁of ▁the ▁local ▁branch . ▁ ▁Mac lean ▁began ▁his ▁career ▁as ▁a ▁lect urer ▁at ▁the ▁University ▁of ▁South am pton ▁at ▁the ▁[ then ] ▁Department ▁of ▁Zo ology ▁under ▁the ▁head ship ▁of ▁Professor ▁Les lie ▁Br ent , ▁was ▁later ▁promoted ▁to ▁a ▁personal ▁chair ▁in ▁Gen et ics , ▁and ▁eventually ▁went ▁on ▁to ▁become ▁Head ▁of ▁the ▁Department ▁of ▁Bi ology . ▁During ▁his ▁career ▁he ▁has ▁been ▁a ▁visit ing ▁fellow ▁and ▁professor ▁at ▁Univers ities ▁including ; ▁the ▁University ▁of ▁California ▁at ▁Davis ; ▁the ▁University ▁of ▁Dal h