Answer
12. Nondisjunction
Work Step by Step
Aneuploidy is the condition in which cell nuclei do not have the right multiples, or sets of chromosomes for the species. In humans, normally, germ cells have 23 chromosomes, and somatic cells have 46 chromosomes(diploid) chromosomes. In Turner's syndrome, the somatic cells have 45 chromosomes, and in klinefelter's syndrome they have 47. These are examples pf aneuploidy.
