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.
In general diploid cells basically contain two complete set of chromosome where as haploid cells have half the number of chromosomes as diploid, in other words haploid cells only contain one complete set of chromosome. They also differ in their division and growth.