What is Prader-Willi syndrome? a genetic disorder that results in persistent feelings of intense hunger and reduced rates of metabolism an eating disorder characterized by an individual maintaining body weight that is well below average through starvation and/or excessive exercise larger individuals have an ideal body weight, or set point, that is resistant to change and smaller individuals do not smaller individuals have an ideal body weight, or set point, that is resistant to change and larger individuals do not

a genetic disorder that result in consist of  persistent feeling of intense hunger and reduced rates of metabolism

Explanation:

Eating is generally needed for survival and growth. without food, man cannot survive. a lot of people are suffering daily from different eating disorder. pander-willi syndrome is cause by the male parent donating 15 chromosomes after a pair was deleted from it. it is a genetic disorder and it causes obesity because a person who  eat always because they are always hungry, learning difficulty and even short height in some cases. there is no general or known cure for it but people who suffer this type of rare syndrome are regularly monitored on a supervised diet.

the sea slugs belong to the same class