The answer is C. We can suppose that the Grey gene is "A" and Black gene is "a". So the gene of heterozygous grey fruit fly is "Aa", and the black-bodied fruit fly is "aa". After mating, the offspring can get only "a" from balck-bodied fruit fly and has equal opportunity to get a "A" or "a" from heterozygous grey fruit fly. If the gene of offspring is "Aa", it will be grey. If "aa", it will be black. So the proportion of being black is 0.5.
Yes!
A tree has plant cells and has a plasma membrane and a cell wall. It also has chloroplasts that contain chlorophyll!
Mitosis is a type of cell division<span> in which chromosomes number remains constant...mitosis helps in growth , repairing of wounds ,cell replacement, and asexual reproduction...</span>
