Women have sex chromosomes XX, and men have sex chromosomes XY. Which of a woman's grandparents could not be the source of any of the genes on either of her X chromosomes?

The grand father could not be source of the woman XX chromosomes.

Explanation:

Female always have XX chromosomes and the male have XY chromosomes. A woman can only release X chromosome and a man can release either X or Y chromosomes. When a man release Y chromosomes and join to the female X chromosome, the offspring will be male but when a man release X chromosome, the offspring will be female.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.