Respuesta :
it's nondisjunction.
non disjunction means the failure of clear separation within homologoous pairs.
non disjunction means the failure of clear separation within homologoous pairs.
The right answer is A.) nondisjunction
Non-disjunction is an absence of separation of two members of a pair of homologous chromosomes or chromatids from a chromosome during meiosis or mitosis, resulting in one of the daughter cells having two copies of the same chromosome or chromatids and the other daughter cell receives none.