What may a cell splitting without proper duplication genes result in?

Animal cells have very effective ';checkpoints'; and ';surveyance'; to avoid this happening, so most aneuploid cells do not survive. However, when they do, various things can result depending on the cell(s) involved:





Gametes (Egg or sperm): Can result in trisomy 21 (Down's syndrome baby) and other very rare conditions.





Stem cells (Fertilized egg): Depends on what stage it happens, but usually leads to spontaneous abortion (miscarriage).





Somatic cells (differentiated cells like skin, muscle, fat): Can result in tumor growth and ultimately cancer.