Regarding Fragile-X Syndrome

question 9

Multiple Choice

Regarding Fragile-X syndrome,

• A) the affected females have nonfunctional ovaries, and estrogen production occurs at negligible levels.
• B) the cause is trisomy, a mistake that occurs in meiosis, and affected individuals carry an extra chromosome.
• C) the phenotype is male, but the testes fail to mature so the individuals are sterile, and the breasts are slightly enlarged.
• D) the cause is a kind of chromosomal deletion known as monosomy where the phenotype is normal female.
• E) the affected individuals display mental retardation, abnormal facial development, and enlarged testes in affected males.

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