Sometimes chromosome number increases or decr | vedclass

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(A) The phenomenon where the number of chromosomes increases or decreases is known as aneuploidy.This occurs primarily due to the failure of segregati

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Non-disjunction of chromosome

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(A) The phenomenon where the number of chromosomes increases or decreases is known as aneuploidy.This occurs primarily due to the failure of segregation of chromatids during cell division,a process called non-disjunction.While mutation is a broad term that can include chromosomal changes,non-disjunction is the specific mechanism responsible for the gain or loss of chromosomes (aneuploidy).Therefore,non-disjunction is the most direct cause of changes in chromosome number.

Sometimes chromosome number increases or decreases due to:

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