The process that produces the chromosome abnormality represented in the given diagram is known as-

Trisomy at the 21 chromosome

Explanation:

due to aneuploidy which is a form of genome mutation.

Even in aneuploidy, it is polysomy which is the presence of extra chromosomes.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.