Note the potential formation of monosomy or trisomy. Once fertilization occurs, the gamete with 24 chromosomes forms a zygote with 47 chromosomes (a trisomy with an extra copy of 1 chromosome).

Of the seven patients, six also had somatic mutations and one had monosomy 7. Four of the five patients with MDS with excess blasts or MDS with unilineage dysplasia who underwent allogeneic ...

Other sonographically detectable aneuploidies include trisomy 13, 18, monosomy X, and triploidy. Second-trimester ultrasound scan detects 2 types of sonographic markers suggestive of aneuploidy.