The stem cells divide through mitosis making two daughter cells. One daughter cell becomes a stem wall, and the other daughter cell differentiates into the tissue, so therefore stem cells maintain their populations because mitosis produces a daughter cell that differentiates, as well as one that self-renews, remaining a stem cell. Good luck, and hopefully this helps you out!
I'm pretty sure that would be selective breeding
D. Is always true is all places.
The number of genes that control the color of the mouse is four that is gene C,gene B,gene A and gene D