Question

Aneuploidy refers to ______.

Options

• Addition or deletion of one or more chromosomes to the total number.

• Addition of entire set of chromosome to the primary basic number.

• Haploid set of chromosomes.

• Tetraploid set of chromosomes.

Answer 1

Aneuploidy refers to the addition or deletion of one or more chromosomes to the total number.

Explanation:

Aneuploidy is when individual chromosomes are added (e.g., trisomy 2n+1) or lost (e.g., monosomy 2n−1), making the total not an exact multiple of the haploid set. Option (B) describes polyploidy, not aneuploidy.