TY - T1 - Does the lack of heritability of human sex ratios require a rethink of sex ratio theory? No : a Comment on Zietsch et al. 2020 SN - / UR - http://hdl.handle.net/10138/330547 T3 - A1 - Orzack, Steven Hecht; Hardy, Ian C. W. A2 - PB - Y1 - 2021 LA - eng AB - ... VO - IS - SP - OP - KW - Dusing-Fisher theory; heritability; human sex ratios; sex allocation; 1184 Genetics, developmental biology, physiology N1 - PP - ER -