Having a complete set or sets of chromosomes is called euploid
aneuploidy is a condition that exists when an organism gains or loses one or more chromosomes but not a complete haploid set
The failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during nuclear division, usually resulting in an abnormal distribution of chromosomes in the daughter nuclei. is called non disjunction. Nondisjunction during either meiosis I or II in the female gamete
Monosomy s the specific term that describes the loss of a single chromosome (2n - 1)
Aneuploidy is the ondition that exists when an organism gains or loses one or more chromosomes but not a complete haploid set
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