All organisms require a set of instructions that specify its traits. the instructions that are responsible for all the inherited traits of an organism
a. are formed after an organism is fully-grown.
b. are encoded in molecules of genetic material.
c. are stored in the organism's brain only.
d. are passed from the offspring to the parent.

is held in genetic material called DNA. The answer is B

Explanation:

the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)