{"knowledge_schema": {"broad_category": "Biology \u2192 Genetics \u2192 Chromosomal Abnormalities", "refinement": "This problem focuses on understanding the mechanisms of chromosomal non-disjunction and its effects on phenotypic expression in Drosophila melanogaster.", "specific_scope": "The context involves analyzing the genetic outcomes of gametogenesis in fruit flies, particularly in relation to the X chromosome and its inheritance patterns.", "goal": "Identify the specific type of non-disjunction event that leads to the unexpected phenotypic male offspring with an X0 chromosomal makeup."}, "summary": "This question pertains to genetics, specifically the phenomenon of chromosomal non-disjunction during gametogenesis in Drosophila melanogaster. The presence of male offspring with an X0 chromosomal configuration suggests a failure in the proper segregation of sex chromosomes during meiosis. The task is to determine which specific non-disjunction event led to this outcome, focusing on the implications of X chromosome inheritance and the resulting phenotypic traits."}