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Chromosomal Disorders:
Chromosomal disorders result from abnormalities in chromosome number or structure.
Aneuploidy: Abnormal chromosome number (trisomy, monosomy).
Polyploidy: More than two sets of chromosomes (triploidy, tetraploidy).
Structural aberrations: Changes in chromosome structure (deletion, duplication, inversion, translocation).
Causes include non-disjunction and translocation.