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.
having two complete sets of homologous chromosomes, such as are normally found in somatic cells and primordial germ cells before maturation. In humans the normal diploid number is 46. Also called diploidic. Compare haploid, tetraploid, triploid.