Diploid (2n) chromosome numbers were determined from cells in late prophase and metaphase of mitosis.
In animals, as in plants, the diploid generation attained the higher development and gradually assumed the dominant position.
The uninitiated sees in the more highly organised plants only a succession of diploid generations.
Similarly all the higher animals appear to us as independent organisms with diploid nuclei only.
They appear with this arrangement in all subsequent nuclear divisions in the diploid generation.
Technically the tissue-cells are said to contain the diploid number of chromosomes, the gametes the reduced or haploid number.