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.
Haploid cell are cells, which are producesd by mieosis, with half the number of cromosomes, these are uaually gamates. a haploid cell is a cell whose chromosomes are singular. they do not pair with other chromosomes. a diploid cell is where there are pairs of chromosomes, like in humans.