What is the advantage of some people to havung sickle cell disease

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

Give an example of a trait that is controlled by more than one gene.

Which best describes this behavior? it is beneficial only to the males that do not fertilize eggs. it is beneficial only to the female workers that are not fertilized. it is beneficial to each one of the individual colony members. it is beneficial to the whole species, but not to all of the individual members.