Chromosomal abnormalities are often the result of an uneven distribution of chromosomes that occurs

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Chromosomal abnormalities typically arise during meiosis, which is the process by which sex cells (sperm and egg cells) are formed. During meiosis, chromosomes are divided into two sets, and errors in this process can result in abnormal numbers of chromosomes in the resulting cells. This can lead to conditions such as Down syndrome, Turner syndrome, and Klinefelter syndrome. Chromosomal abnormalities are not typically the result of events at conception, during mitosis, or at the time of implantation.

Chromosomal Abnormalities Are Often the Result of an Uneven Distribution