Individuals with ________ have only one sex chromosome, and it is an X chromosome.
A) Trisomy 21
B) Down's syndrome
C) Turner's syndrome
D) Fragile-X syndrome
E) Klinefelter's syndrome

Question

Quizplus · Accepted Answer

Turner's syndrome is the only option listed where the individual has only one sex chromosome, and in this case, it is an X chromosome. Trisomy 21 (A) is also known as Down syndrome and occurs when an individual has three copies of chromosome 21. Fragile-X syndrome (D) is a genetic disorder caused by a mutation in the FMR1 gene on the X chromosome. Klinefelter's syndrome (E) is a condition where individuals have an extra X chromosome, resulting in XXY instead of the typical XY or XX.

Individuals with ________ Have Only One Sex Chromosome, and It