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Which of the following statements regarding human genetic disorders is accurate?
A. Disorders in individual genes can cause disease or provide individuals with a genetic advantage.
B. Nondisjunction can lead to an incorrect number of sex chromosomes.
C. Nondisjunction is responsible for causing Huntington's disease.
D. Disorders in individual genes are responsible for Down's syndrome.

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Kalahira
Human genetic disorders can be caused largely by the change of the DNA sequence from its normal sequence. This can also be caused by a monogenic disorder, a mutation in a gene. So the best answer to this question would be letter B since nondisjunction causes chromosomal abnormalities.

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