Answer:
The correct answer is Non-disjunction.
Explanation:
Non- disjunction is the failure of chromosomes to separate during the cell division. This can occur in both meiosis I, II and mitosis during their anaphase.
Non-disjunction of homologous chromosomes lead to "aneuploidy" that is the production of daughter cells with different amount of chromosome number like non-disjunction at meiosis I produce cells with trisomy (one extra chromosome) and monosomy (one less chromosome).
Thus, Non-disjunction is the correct answer.
