. Cytology, with special reference to the metazoan nucleus. Cells. n8 CYTOLOGY E Fig. 54. The chromosomes in the life-cycle of Phylloxera fallax. (After Morgan, , 1909, and 1915 a.) A, B, polar body formation in a 9 -producing parthenogenetic egg: all the chromosomes retained ; C, D, polar body formation in a & -producing parthenogenetic egg, showing elimination of the X chromosome: E, metaphase I., sexual egg ; F, chromosome group from a ? embryo, twelve chromosomes ; G, chromosome group from a £ embryo, ten chromosomes. polar body ; X, the (double) sex Plea

---

. Cytology, with special reference to the metazoan nucleus. Cells. n8 CYTOLOGY E Fig. 54. The chromosomes in the life-cycle of Phylloxera fallax. (After Morgan, , 1909, and 1915 a.) A, B, polar body formation in a 9 -producing parthenogenetic egg: all the chromosomes retained ; C, D, polar body formation in a & -producing parthenogenetic egg, showing elimination of the X chromosome: E, metaphase I., sexual egg ; F, chromosome group from a ? embryo, twelve chromosomes ; G, chromosome group from a £ embryo, ten chromosomes. polar body ; X, the (double) sex Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agar, W. E. (Wilfred Eade), 1882-1951. London, Macmillan and Co. , limited

---

Size: 1359px × 1838px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1920, booksubjectcells, bookyear1920