| Most aneuploids arise by nondisjunction, a failure of homologous chromosomes to separate at meiosis. |
| There was no evidence to show an effect of maternal or paternal age on the frequency of nondisjunction. |
| Nondisjunction of chromosomes was frequently observed in the UVB-arrested eggs. |
| Trisomy 21, more commonly known as Down syndrome, occurs as a result of an error in cell division known as nondisjunction. |
| Males arise spontaneously through nondisjunction of the X chromosome during gametogenesis and the subsequent fusion with a normal gamete, yielding an XO individual. |
| Susceptibility of these chromosomes to nondisjunction may be due to reduced connections among homologous pairs in nonrecombinant chromosomes. |
