In the cell by meiosis ploidy
occurs in meiosis . Initially,
taking as a 2n somatic ,
ploidy increases to (duplication of
DNA) interphase. During meiosis
, since homologous chromosomes
separated, ploidy falls 2n (the original
) and then during II
ploidy finally to n in resulting
daughter cells.

reduction does not in
mitosis.This fact that, although
in ploidy is decreased its
original number, meiosis II, a
similar to mitosis,the of that
reduction what happens in I,
i.e., the of the homologous
.