What Is the Relationship Between a CGG Nucleotide Sequence on the X

question 47

Multiple Choice

What is the relationship between a CGG nucleotide sequence on the X chromosome and the development of Fragile X syndrome?

• A) Anyone who has a CGG nucleotide sequence repeating more than twice on the X chromosome will show symptoms of Fragile X syndrome.
• B) Any male who has a CGG nucleotide sequence repeating more than twice on the X chromosome will show symptoms of Fragile X syndrome.
• C) Anyone who has more than 50 repeats of the CGG sequences usually shows symptoms of Fragile X syndrome
• D) In general, the more repeats of the CGG nucleotide sequence, the more severe the children's cognitive impairments.

---

Definitions:

Caudate Nucleus

A brain structure within the basal ganglia involved in various functions including learning, memory, and voluntary movement control.

Putamen

A structure located within the basal ganglia that is involved in regulating movements and influencing various types of learning.

Limbic System

A sophisticated neural system within the brain, responsible for managing innate behaviors and mood, overseeing primary feelings (such as fear, happiness, and rage) and basic desires (including eating, sexual behavior, power, and offspring care).

Thoracic

Relating to the thorax, the part of the mammalian body between the neck and the abdomen, housing primary organs such as the heart and lungs.