Q5: Since the boy has DMD, it means the mother is a carrier. So one of the X chromosomes she carries has the DMD mutation. If the normal X chromosome becomes inactivated in her muscle cells (so-called "unfavorable lyonization"), she would display the phenotypical features of the disease

Name other areas

Why not progesterone

trichomonas: strawberry [erythematous] mucosa, elevated pH, and motile trophozoites. Differential would have been Gardnerella vaginalis but microscopy of this shows clue cells, or vaginal epithelial cells covered by bacteria. Both are treated with metronidazole

double vision,ptosis,muscle weakness,fatigueimrovement in muscle strenght with neostigmine.DX is myesthenia gravis where there are antibodies are present against post synaptic ACH receptors which is membrane protiens.

 C yolk scak tumor

http://www.bioon.com/bioline/neurosci/course/brstem.html