Answer : 2. "Genes found on chromosomes"
Explanation :

Answer: B) Genes found on chromosomes Explanation: Genetic alteration probably refers to altering Genes found on chromosomes.   Genetic alteration refers to altering DNA sequence. Gene alteration forms genetically modified products that modifies the gene sequence.   Genetic engineering, also called genetic modification or genetic manipulation, is the direct manipulation of an organism's genes using biotechnology.