Pairing at the chromosomal level.
D002874:Chromosome Mapping; D002875:Chromosomes; D003434:Crossing Over, Genetic; D004330:Drosophila / Q000166:cytology; D005260:Female; D008540:Meiosis; D008938:Mitosis; D010063:Ovum / Q000166:cytology; D013696:Temperature