1. genetic alteration probably refers to altering
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Genetic alteration probably refers to altering the DNA sequence present in the genes of chromosomes.

Explanation:

Genetic alternation occurs when the DNA of an organism gets altered due to any circumstance. Even a change in a single nucleotide can have devastating effects on the organism. It can occur due to mutations or physical factors like radiation, UV etc. Genetic alternations can be useful as well as harmful. Genetic alternation is also a source due to which variations might arise in a population and hence, it leads to biodiversity.

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explanation:

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