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.
â¢ Diploid cells are genetically identical to the parent cell, and haploid cells are not genetically identical to the parent cell. â¢ Haploid cells are important in sexual reproduction, and diploid cells are important in growth, asexual reproduction and genetic stability.