PLZ HELP!!! What are 3 genetic disorders caused by either missing or extra chromosomes? In your own words, provide a brief short explanation of what causes the disorder and some potential symptoms.

BEST ANSWER WILL BE MARKED AS BRAINLIEST!!!

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

Ithink it’s one of those things that you put the object on