In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (1). What is the sex and eye color of flies with the following genotype (see pic)?

Yes it is hereditary because of the penis

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.