chiasmatypy
noun
chi·as·ma·typy
-ˌtīpē
plural -es
: the spiral twisting of homologous chromosomes during zygotene that results in intimate association of chromatids with chiasma formation and provides the mechanism for crossing over
Word History
Etymology
International Scientific Vocabulary chiasma- (from New Latin chiasma) + -typy; originally formed as French chiasmatypie