Genes that are located on the same chromosome and are close together:

A)always segregate from one another during division.
B)may not assort independently of each other.
C)are never located on the X chromosome.
D)are usually clustered on the Y chromosome.
E)are always located on autosomes.

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)

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

d. planting trees

the trees take in carbon to make oxygen.

the answer is d. none of the above