3. Is it possible for a male to have normal color vision and carry the gene for color blindness? Explain.

The 23rd chromosome is made up of two parts – either two X chromosomes if you are female or an X and a Y chromosome if you are male. A colour blind boy can't receive a colour blind 'gene' from his father, even if his father is colour blind, because his father can only pass an X chromosome to his daughters.

Explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: