Certification. If a sonographer has obtained education through a college or university, the sonographer must pass an exam in order to get their certification. Some states require that ultrasound technicians be licensed, which requires them to hold current certification.
diploid â(not comparable) (cytology) Of a cell, having a pair of each type of chromosome, one of the pair being derived from the ovum and the other from the spermatozoon. Most somatic cells of higher organisms are diploid.
Diploid cells are organisms that consist of two copies of each chromosome, typically one inherited from the mother and another from the father. Diploid cells reproduce by a type of cell division called mitosis that takes place in the nucleus.