Which description best explains the role of dna im the differentiation of the cells within an organism? a. each cell has a different set of dna that determines the traits of the cell and causes differentiation. b. each cell has the same dna, so dna does not play a role in differentiation. c. cells do not use the same sections of dna in the same proportions, at the same time in development, which leads to differentiation. d. dna mutates differently in each cell depending in the environment causing each cell to differentiate over time.

All the cells in a person's body have the same DNA and the same genes. However, the difference between cells in different tissues and organs is that the "expression" of the genes differs between cells. For example, liver cells have different proteins than skin cells, even though their DNA is the same.

So your answer is B

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)