Question

Duchenne muscular dystrophy is an X linked gene. What has expected if an individual has this gene?

(a) Neonatal death

(b) 2-5 months life expectancy

(c) 2-5 years life expectancy

(d) 30 years life expectancy

This question was addressed to me in a national level competition.

My query is from Effects of Environment topic in chapter Nuclear Export & Post Mendelian Genetics of Cytogenetics

Answer 1

Right option is (c) 2-5 years life expectancy

Best explanation: In case of Duchenne muscular dystrophy the age of onset of the disease is about 2-5 years of age. This is a lethal gene which is X linked recessive.