Most chromosomal defects result from

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Chromosomal defects typically result from errors in meiosis, which is the type of cell division that produces gametes (sperm and egg cells). During meiosis, homologous chromosomes pair up and exchange genetic material. Mistakes during this process can result in chromosomal abnormalities, such as nondisjunction (failure of chromosomes to separate properly) or translocations (when parts of chromosomes break off and attach to other chromosomes). Somatic mutations and germ-line mutations can also occur, but they typically do not result in chromosomal defects. Mistakes in mitosis can lead to chromosomal abnormalities in individual cells, but they are not typically inherited.

Most Chromosomal Defects Result from