Ladbrokes Championship leaders Hibernian were held to a 2-2 draw by Dumbarton at Easter Road on Saturday.
The Sons were twice ahead through Christian Nade (penalty) and Robert Thomson but Daniel Harvie's OG and Martin Boyle earned Hibs a point.
Morton moved level on points with second-placed Falkirk after winning 1-0 away to the Bairns - Kudus Oyenuga scored the only goal.
Ayr United ended their long wait for an away league win, beating Dunfermline 1-0 at East End Park with a Ross Docherty goal.
Raith Rovers defeated Dundee United 2-1 at Stark's Park with goals from Craig Barr and Ryan Hardie before Simon Murray pulled one back.
Bottom club St Mirren were 2-0 winners away to Queen of the South, with goals from Stevie Mallan and Rory Loy (penalty).