Why do x-linked traits appear more often in males

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.

What is the one part of the nucleotide  that differs among the other different nucle  tides?