The clip is attributed to Carlitos Alcántara, a character from the long-running Spanish television series Cuéntame cómo pasó, and it circulates online as a short soundboard excerpt of him beginning to explain Mendel's laws. The series follows a Spanish family across decades, and moments like this classroom-style recitation have become easy to reuse outside their original scene. Shared mainly as a brief voice snippet, it has found a second life among Spanish-speaking viewers who recognise the character and the school setting, keeping it useful for biology jokes, study content and nostalgic edits long after its original broadcast.