What is a result of nondisjunction in which an individual has three copies of a chromosome instead of two NEED HELP FAST

The correct answer would be - trisomy.

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.

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the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.