Most people can see every color in the rainbow. However, some people can only see a few colors, or just black, white, and shades of gray. The fact that most people who are color-blind were born that way is a clue that Question 14 options: color blindness is a learned trait. Color blindness is a dominant trait. Color blindness is an inherited trait. Color blindness is an unimportant trait.

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.