Answer: bivalent

AnswerCrossword Clue
BIVALENTTetrad, in genetics
BIVALENTDouble, in biology.
bivalentpair of bivalent chromosomes, esp. when pairing during meiosis
bivalenta pair of chromosomes
bivalenta. having a valence of two b. having two valences, as aluminum with valences of two and three
bivalentpertaining to associations of two homologous chromosomes