Archive image from page 116 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar_0 Year: 1920 r x K The chromosomes of Lygaeus turcicus. (After Wilson, , 1905 and 1912.) A, spermatogonial telophase ; B, later telophase ; C, emergence of the massive chromatic bodies in the primary spermatocyte; D, leptotene stage ; E, ' confused stage ' ; F, evolution of the bivalents ; G, metaphase I.; H, I, daughter chromosome groups of anaphase I.; J, metaphase II., X and Y, now paired to form a bivalent; K, L, daughter chromosome gro
Archive image from page 116 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar_0 Year: 1920 r x K The chromosomes of Lygaeus turcicus. (After Wilson, , 1905 and 1912.) A, spermatogonial telophase ; B, later telophase ; C, emergence of the massive chromatic bodies in the primary spermatocyte; D, leptotene stage ; E, ' confused stage ' ; F, evolution of the bivalents ; G, metaphase I.; H, I, daughter chromosome groups of anaphase I.; J, metaphase II., X and Y, now paired to form a bivalent; K, L, daughter chromosome groups from anaphase II. of spermatozoa in Lygaeus—one, the 6+X form, will on fertilizing an egg produce a female, the other (6+Y form) will produce a male. The process of meiosis in the male Lygaeus is illustrated in Fig. 46. This figure demonstrates the important fact that the sex chromosomes of the male often (though not in all cases; see below) remain compact throughout the whole meiotic prophase, including the leptotene and zygotene stages. •It will be noted in Fig. 46, G, that X and Y are not paired to form
Size: 1232px × 1623px
Photo credit: © Bookive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1920, agar_w_e_wilfred_eade_1882_1951, americana, archive, blc, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, cells, drawing, historical, history, illustration, image, london_macmillan_and_co_limited, page, picture, print, reference, vintage, wellesley_college_library
