You would want to approach the person and see if they are breathing and call for an ambulance.
The parent may have had an recessive gene that didn't show up in them but showed up in the the offspring!!
The lysosomes are responsible for that
Hypothesis is what you think will happen before the experiment, it isn't necessarily backed up by any sources or evidence. A scientific law is the observation of a phenomenon and a theory is the explanation both can be used together to back each other up.