Statistical analyses tested the main effects of chromosomal complement, gonadal sex, and their interaction.<h4>Results</h4>Tumor multiplicity (<i>p</i> = 0.0729), tumor area (<i>p</i> = 0.5302), normalized tumor burden (<i>p</i> = 0.5316), and <i>Ki-67</i> indices (<i>p</i> = 0.6551) did not differ among genotypes. The gene discussed is MKI67; the disease is neoplasm.