Trisomic rescue (also known as trisomy rescue or trisomy zygote rescue) is a genetic phenomenon in which a fertilized ovum containing three copies of a chromosome loses one of these chromosomes (anaphase lag) to form a diploid chromosome complement. If both of the retained chromosomes come from the same parent, then uniparental disomy results.
Trisomic rescue is a genetic event where an ovum with three copies of a chromosome loses one, forming a diploid set. If both retained chromosomes are from the same parent, it results in uniparental disomy.