Recently extended until January 31 from a six-week run at The Marsh Berkeley (2120 Allston Way), Mother’s Milk tells the coming-of-age story of a young Black man trying to find his roots. The show is steeped in gospel and blues music, and although it’s set during St. Louis’ influential civil rights movement, it is very much a personal tale. Wayne Harris, who stars in the solo show, navigates his mother’s impending death as she battles breast cancer amid a colorful cast of characters — from the women at church to a slightly inebriated preacher. Harris is a veteran Marsh storyteller and has produced five solo shows, including Tyrone “Shortleg” Johnson and Some White Boys, which won the 2012 San Francisco’s Fringe Festival’s “Best of Fringe” award. He takes the stage in Mother’s Milk with musical director and piano accompanist Randy Craig and bassist John McArdle under the direction of David Ford.