Genetic mechanism of alternating sexes in #walnut #trees has some parallels to #SexDetermination in humans https://phys.org/news/2025-01-genetic-mechanism-alternating-sexes-walnut.html

Ancient structural variants control sex-specific #flowering time morphs in #walnuts and #hickories https://www.science.org/doi/10.1126/science.ado5578

"A walnut #tree produces #flowers of one sex, then the other in the same season, but trees differ in which one comes first. Individual trees are consistently male-first or female-first in flowering."