Answer:
The correct answer would be - trisomy.
Step-by-step explanation:
During cell division, if paired chromosomes failed to disjoin or separate from one another and therefore, pass both chromosomes to one daughter cell and none to another daughter cell. It leads to several errors in the chromosome numbers in the zygote which leads to disease or syndromes.
Trisomy or down syndrome is the condition that occurs due to nondisjunction when an individual has three copies of a chromosome in the zygote instead of two copies.