The Montreal riding long held by Pierre Bourque, who was the city's mayor and then opposition leader, has been won by a rival party in a byelection.
Bernier-Genest is a member of current Mayor Gerald Tremblay's party, the MontrealIslandCitizens' Union.
Quebec police have issued a warrant for the arrest of a Laval man in connection with the shooting death of a man in Terrebonne, north of Montreal, on Tuesday.
Montreal has a substantial anglophone minority and an increasing population of allophones (those whose first language is neither English nor French), including both ethnic communities with deep historical roots, and substantial numbers of recent immigrants of whom a substantial number are integrated into the French-speaking community.
Montreal is situated in the southwest of Quebec, approximately 200 kilometres (120 miles) southwest of Quebec City, the provincial capital, and 150 kilometres (90 miles) east of Ottawa, the federal capital.
The city sits on the Island of Montreal at the confluence of the Saint Lawrence River and Ottawa River; the island divides the Saint Lawrence between the main channel and Rivière des Prairies.