Research on sex chromosome disorders shows that

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Research has found that both boys and girls with an extra X chromosome (47,XXX or 47,XXY) are at an increased risk for reading difficulties. Additionally, individuals with Turner syndrome (45,X) may experience verbal difficulties, but it is not a universal characteristic of the disorder. XYY syndrome has also been associated with increased aggression and antisocial behavior, but this is not true for all individuals with the disorder. Mental retardation is not a prevalent characteristic of sex chromosome disorders.

Research on Sex Chromosome Disorders Shows That