Table 1.
Female-producing temperatures | Male-producing temperatures | |
XX (ZW) | Female (in accordance with genotype) | Female OR male (in discordance with genotype) |
XY (ZZ) | Male OR female (in discordance with genotype) | Female (in accordance with genotype) |
The combination of genotypic and temperature-dependent sex determination allows a phenomenon known as sex reversal, where the phenotypic sex does not always agree with the genotypic directions.