Which type of chromosomal mutation causes this form of down syndrome? nondisjunction, insertion, inversion, or deletion

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

answerbecause the joint is relatively unstable and can easily dislocate