That are produced by the interaction of many genes (ex: eye color) are said to be A- Haploid
B-Polygenic
C-Codominant
D- Diploid

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

the answer is cell division : )