18: D, homologous
20: B, DNA
I can’t see 17 or 19!
G0 phase cells
The mitotic cycle of somatic, or body, cells is responsible for the production of copies of those cells. The mitotic cycle has different phases, each of which involves a different set of physiological changes to the cell. The G0 phase is described as the resting phase of a cell, where no activities relating to cell division are taking place. G0 phase cells remain in this phase their entire lives, so they do not divide. Another example of such a cell is found in red blood cells.
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The answer is DNA because genotype is the genes of an organism and genes = DNA.