I think it's option four because as far as I know, red/green color blindness is an example of a recessive, sex-linked trait (encoded on the X chromosome), which results in much more men to suffer from it than women.
Hope that helps!
<span>At the base of Arthropoda.</span>
Structures that are common to all cell types:
* Plasma membrane
* Cytoplasm
* DNA
* Ribosomes
Functions:
* Plasma membrane provides protection to cell
* Cytoplasm holds components of cell and protects from damage
* DNA stores information for making proteins
* Ribosomes decode and form peptide bonds
Molecules that cannot cross the membrane bind to receptors in the membrane. When the signal binds to a receptor changes it's shape. Other Molecules inside the cell respond to the chainging shape of the receptor.