See Also: meiotic nondisjunction(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Nondisjunction(medicine)
secondary nondisjunction(medicine)
primary nondisjunction(medicine)
mitotic nondisjunction(medicine)
Meiotic(medicine)
meiotic(dictionary)
first meiotic division(medicine)
meiotic division(medicine)

meiotic nondisjunction (medicine)


meiotic nondisjunction
Failure of two memberrs of a chromosome pair to separate (disjoin) during meiosis so that both go to one daughter cell and none to the other. This mechanism is responsible for the extra chromosome 21 in trisomy 21 (down syndrome) and for extra and missing chromosomes causing other birth defects and many spontaneous abortions (miscarriages).