Name the sections of DNA that contain instructions for a specific trait.

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection