Ladbrokes Championship leaders Hibernian moved closer to clinching the title with a 1-1 draw at Cappielow on Saturday.
Jason Cummings gave Neil Lennon's men the lead but Lawrence Shankland equalised for Morton from the penalty spot midway through the second half.
Falkirk stay second after a 1-1 draw against Dundee United at Tannadice, with Luke Leahy cancelling out Simon Murray's opening goal.
Dunfermline Athletic won the Fife derby 1-0 at East End Park to leave Raith Rovers in trouble near the bottom. Kallum Higginbotham scored the only goal from the penalty spot early in the second half.
Queen of the South beat Ayr United 2-0 at Somerset Park thanks to a Stephen Dobbie double as the Honest Men dropped to the foot of the table.
St Mirren and Dumbarton drew 1-1 at the Paisley 2021 Stadium. Kyle Magennis gave Saints an early lead but Lewis Vaughan equalised before half-time and the home side had Adam Eckersley sent off late on.
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