Which of the following is X-linked recessive?: (A) Duchenne muscular dystrophy, (B) Hypophostemic rickets, (C) Marfans syndrome, (D) Downs syndrome
Answer is A. Ans. (a) Duchenne muscular dystrophy(Ref: R 9th/pg 142)a. Duchenne muscular dystrophyX-linked recessiveb. Hypophostemic ricketsX-linked dominantc. Marfans syndromeAutosomal dominantd. Downs syndromeChromosomal trisomy