One way in which the sperm cell is different from cells in the developing fetus is that the sperm cell is a haploid cell while the cells in developing fetus are diploid cells.
Sperm and egg cells are derived from meiotic division of parts of the male and female's reproductive organs respectively.
Meiosis, the division of sex cells, leads to daughter cells with half the genetic materials of the parent cells which are naturally diploid (2n). These daughter cells are also referred to haploid cells (n).
A fetus is formed from the combination of a haploid sperm (n) and a haploid egg (n) resulting in a diploid (2n) structure.
Thus, the cells in the developing fetus are diploid because they are formed from the combination of 2 haploid cells - the sperm and the egg.
More on the sperm cell can be found here: https://brainly.com/question/9132681
