Duchenne's muscular dvstrophy-: (A) X-L inked dominant, (B) X-Linked recessive, (C) Autosomal dominant, (D) Autosomal recessive
Answer is B. Ans. is 'b' i.e., X-linked recessive o Duchenne and Becker's muscular dystrophy are X-like recessive,o So expression of gene is essentially confirmed in males.o Females are affected only if X-chromosome carrying the normal allele is lost or inactivated.