My mom sang in high school choir and so did my father.

The speaker points to a family background of choral singing—both mother and father participated in high school choir—implying that musical involvement runs in the family and may have shaped the speaker’s own interests or abilities. The line functions as a simple, autobiographical explanation of inherited or learned musical inclination: exposure to singing as a normal activity in the household can encourage confidence, ear training, and a sense of belonging in musical communities. In many interview settings, such a remark serves to ground later achievements in ordinary formative experiences rather than in sudden talent.