Nullisomy is caused by non-disjunction, during meiosis that causes two of the gametes to have no chromosomal material, leaving the other two gametes to have double the amount of chromosomal material (disomic). Due to the lack of genetic information, the<unk>  gametes are rendered unviable for fertilization.
Nullisomic
Proximate
Heteroecious
Abionic
Biosimilar
Singe
Vangent
Patched