title: X-chromosomal heterosis in Drosophila melanogaster.
mesh_terms: D004261:DNA Replication; D004331:Drosophila melanogaster / Q000235:genetics*; D005260:Female; D006801:Humans; D006823:Hybrid Vigor; D006824:Hybridization, Genetic; D012730:Sex Chromosomes; D014960:X Chromosome