Verified answer

Cystic fibrosis (CF) is a genetic disorder that results from the inheritance of two recessive alleles. This genetic disorder is caused by a defective protein in the plasma membrane that allows the formation and subsequent accumulation of thick mucus in the lungs and digestive tract. Improved treatment and therapy has helped increase the life expectancy of individuals with this genetic disease so the answer is C.

I really despair when I see people giving wrong answers to simple questions, then saying they're a "biology major" or something like that.

The answer is B, single (autosomal) recessive gene.

It is a single recessive gene (autosomal, not sex-linked). Hope I helped!

It is a single recessive gene that is autosomal.

I WANT TO SAY C OR D. WAIT TAKE THAT BACK. B OR A RATHER B