This story was originally published on HackerNoon at: https://hackernoon.com/permutations-of-sex. The sex of the egg is optional. Check more stories related to science at: https://hackernoon.com/c/science. You can also check exclusive content about #science, #non-fiction, #hackernoon-books, #project-gutenberg, #books, #jean-henri-fabre, #ebooks, #bramble-bees-and-others, and more. This story was written by: @jeanhenrifabre. Learn more about this writer by checking @jeanhenrifabre's about page, and for more stories, please visit hackernoon.com. The sex of the egg is optional. The choice rests with the mother, who is guided by considerations of space and, according to the accommodation at her disposal, which is frequently fortuitous and incapable of modification, places a female in this cell and a male in that, so that both may have a dwelling of a size suited to their unequal development. This is the unimpeachable evidence of the numerous and varied facts which I have set forth. People unfamiliar with insect anatomy—the public for whom I write—would probably give the following explanation of this marvellous prerogative of the Bee: the mother has at her disposal a certain number of eggs, some of which are irrevocably female and the others irrevocably male: she is able to pick out of either group the one which she wants at the actual moment; and her choice is decided by the holding capacity of the cell that has to be stocked. Everything would then be limited to a judicious selection from the heap of eggs.