General Science • BiologyMedium
In human genetics, what causes Turner syndrome, characterized by monosomy of the sex chromosomes?
A. Presence of an extra X chromosome resulting in XXY karyotype
B. Complete absence of one X chromosome resulting in 45,X0 karyotype✓ Correct Answer
C. Trisomy of chromosome twenty-one
D. Deletion of the short arm of chromosome five
💡 Solution & Explanation
Turner syndrome is a genetic chromosomal disorder caused by monosomy of the sex chromosomes, where affected females possess only a single X chromosome leading to a 45,X0 karyotype. Klinefelter syndrome involves an extra X chromosome producing XXY, Down syndrome results from trisomy twenty-one, and Cri-du-chat syndrome stems from a deletion on chromosome five. Individuals with Turner syndrome typically exhibit short stature and gonadal dysgenesis.
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