The sort of chromosomal abnormality that has the greatest chance of surviving in humans is known as trisomy.
Both numerical and structural chromosomal abnormalities are possible. A numerical anomaly indicates that a person either lacks one of a pair's chromosomes or has more then two chromosomes. The structure of the chromosome has been altered during one of numerous ways when there is a structural problem.
One of the potential parents has a chromosomal abnormality, and other risk factors include the woman's advanced age, a personal history of genetic disorders, a previous child who was born with a birth defect or experienced a miscarriage.
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