La valeur typique de cette propriété est le nombre de chromosomes le plus fréquent dans une cellule corporelle typique chez un individu adulte normal d'une espèce. Par exemple sur Homo sapiens (Q15978631) :
3. Cell type difference. There are different chromosome count between cell type (Q189118). For example, red blood cell (Q37187) has 0 chromosome. cancer cell (Q4118072) has various number. For this property, use chromosome count for typical body cell (e.g. In human, use 46)
4. Variations in disease or syndrome. For example, Down syndrome (Q47715) has 47 chromosomes. This kind of data is stored at disease or syndrome item page like Down syndrome#P5230, but not species page. Because there are many kind of disease or syndrome which has chromosome count variation.