25 POINTS HELP!! If the normal DNA sequence is GCA-TAA, what type of mutation would GCT-ATA-A be? a.) deletion b.) insertion c.) substitution d.) none of the above

Insertion

Explanation:

GCT-ATA-(A) has an extra unit. Therefore, one has been inserted in the sequence.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).