The mechanistic conception of life : biological essays (1912)
Loeb, Jacques, 1859-1924 · Chicago, Ill. : University of Chicago Press · leaf 29
terest that,according to Guyer, in the human being two kinds of sperma-tozoa exist and only one kind of eggs; in man, therefore, sexis determined by the spermatozoon. 18 The Mechanistic Conception of Life How is sex determination accomplished ? Let us takethe case which according to Wilson is true… … Figs. 11-16 (after E. B. Wilson).—Diagrammatic presentation of sex deter-mination in an insect (Protenor). a a are the nuclei of im^fertUized eggs. Eachcontains one sex cliromosome marked X; the other six dark spots are the chromo-somes which are supposed to transmit hiereditary characters not…
