Prader-Willi syndrome is caused by a missing gene on chromosome 15. Normally, parents each pass down a copy of this chromosome. The defect can occur in a couple of ways: The father's genes are missing on chromosome 15; There are defects or problems with the fatherâs genes on chromosome 15
poison meaning, definition, what is poison: a substance that can make people or animals ill or kill them if they eat or drink it: . Learn more.
Wiktionary(0.00 / 0 votes)Rate these synonyms: 1  poisonous(adjective) Synonyms: venomous, attery, toxic. 2  poisonous(adjective) Containing sufficient poison to be dangerous. Synonyms: 3  poisonous(adjective) Inedible due to containing poison; poisonous to eat. Synonyms: