Which of the following sex-linked diseases is characterized by a waddling gait, toe walking, frequent falls, and difficulty in rising, and may appear as soon as the child starts to walk?
A) hemophilia
B) fragile X syndrome
C) color-blindness
D) Duchenne muscular dystrophy
E) None of the answer choices is true.

Question

Quizplus · Accepted Answer

Duchenne muscular dystrophy is a sex-linked recessive disease that affects muscle strength and mobility. The symptoms include a waddling gait, toe walking, frequent falls, and difficulty in rising, which may appear as soon as the child starts to walk. Hemophilia is also a sex-linked recessive disease, but it affects blood clotting and does not cause these specific symptoms. Fragile X syndrome is a genetic disorder that causes intellectual disability and may have physical symptoms, but not necessarily these specific ones. Color-blindness is a sex-linked recessive disease that affects vision and does not cause these specific symptoms.

Which of the Following Sex-Linked Diseases Is Characterized by a Waddling