Diploid refers to a cell that has two copies of each chromosome. One way that a diploid organism could have an offspring that are 3n (triploid) or 4n is when the chromosomes don't separate during meiosis.
Triploid refers to some cell that have 3 copies of each chromosomes for a total of 69 chromosomes.
it takes place in the eukaryotic and prokaryotic cells.
in eukaryotes cell, it occurs in the matrix of the mitochondrion.
as you consider this, to me the answer is matrix
It would be wind wouldn't it?