Chronic myelogenous/myeloid leukaemia is a human neoplastic disorder arising from a chromosomal aberration. Discuss the different genetic screening techniques that can determine the genotype leading to this disorder (50%), and outline how this genotype leads to this condition (50%).

the answer to your question is sperm

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

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).