Suppose you chop down a plant in the woods and bring it home to examine. you cut a cross section of the stem and you note that it has pith in the center. how would you classify this plant?

Mostly plants with pith in the centre have dicots stems mostly they are usually darker inner wood of a large diameter trunk is termed the heartwood and is the result of tylosis. The outer, living wood is termed the sapwood. New pith growth is white or pale in color, as the tissue ages it commonly darkens to a deeper brown color. In trees pith is usually present in young growth.

this protocol provides a detailed procedure for chromatin immunoprecipitation (chip) to study the dna-protein interactions.

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)