_____ syndrome causes males to have undeveloped testes, enlarged breasts, and tallness. Boys with this chromosomal disorder often have language, academic, attentional, and motor impairments.
A) Down
B) Klinefelter
C) Turner
D) Fragile X

Question

Quizplus · Accepted Answer

The symptoms described in the question are consistent with Klinefelter syndrome, which is caused by an extra X chromosome (XXY) in males. Down syndrome is caused by an extra chromosome 21, Turner syndrome is caused by missing or partially missing X chromosome, and Fragile X syndrome is caused by a mutation in the FMR1 gene on the X chromosome. These syndromes have different sets of symptoms than those described in the question.

_____ Syndrome Causes Males to Have Undeveloped Testes, Enlarged Breasts