Which of the Following Is True of Fragile X Syndrome

question 8

Multiple Choice

Which of the following is true of Fragile X syndrome?

• A) Affected individuals have testicular atrophy beginning at puberty
• B) Accurate prenatal diagnosis of full-mutation females is available
• C) Premutation carriers show no phenotypic effects
• D) Expansion of premutation alleles occurs primarily during spermatogenesis
• E) It is almost always associated with a trinucleotide expansion in the 5' untranslated portion of FMR1

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Definitions:

Nerve

A bundle of fibers that transmits electrical impulses toward and away from the brain and spinal cord, facilitating communication between the body and nervous system.

Electrical Messages

Signals transmitted along neurons through changes in electrical potential, facilitating communication within the nervous system.

Nervous Tissue

A type of tissue composed of neurons and glial cells, specializing in the transmission of electrical nerve impulses throughout the body.

Neuroglial Cell

Neuroglial cells, commonly known as glial cells, support, protect, and maintain the homeostasis of the nervous system, playing roles in nutrient supply to neurons and damage repair.