| They looked for sperm disomy, which occurs when sperm cells have an abnormal number of chromosomes. |
| They also identify long contiguous stretches of homozygosity, which may suggest an increased likelihood for a recessive condition or uniparental disomy. |
| Uniparental disomy and imprinting modify gene expression with passage through maternal or paternal meiosis. |
| Of further interest is the report describing uniparental disomy, the presence of both chromosomes inherited from 1 parent as the result of disomic rescue. |
| Discordant results between fetal karyotyping and non-invasive prenatal testing by maternal plasma sequencing in a case of uniparental disomy 21 due to trisomic rescue. |
| In a complete molar pregnancy, both sets of chromosomes are from the father, a condition known as paternal uniparental disomy. |
