Polyploidy most commonly arises due to which of the following events?

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The process of crossing over during meiosisCrossing over occurring between non-homologous chromosomesThe division of the nucleus known as karyokinesisThe inability of homologous chromosomes to separate properly during meiosisAn error in DNA replication during interphase

Explanation

Polyploidy typically results when homologous chromosomes fail to separate during meiosis, leading to cells with extra sets of chromosomes. This nondisjunction event causes the chromosome number to double, unlike crossing over or normal nuclear division processes.