. Cytology, with special reference to the metazoan nucleus. Cells. 0r icolor ual lents and one tetrapar- Fig. 68. fifp V nf thp tvne shown The chromosomes of Jamaicana subguUala (A-E) and /•»"»»« tlie V 01 ine type MIUWH (Woolsey, , 1915.) a, spermatogonium of an mdund in fhp figure As the with the type number (35) of chromosomes. Ihe chromosomw arc m ine ngure. ^b UlC ^^^^^^ered in pairs from the smallest to the largest. No 18 js the sex ^nprma f O^onial divisions chromosome. B-E, chromosomes of an individual m which one menibor SpermatOgOnidi aiVlblUllb ^^ ^^^ homologous pairs (14 a
. Cytology, with special reference to the metazoan nucleus. Cells. 0r icolor ual lents and one tetrapar- Fig. 68. fifp V nf thp tvne shown The chromosomes of Jamaicana subguUala (A-E) and /•»"»»« tlie V 01 ine type MIUWH (Woolsey, , 1915.) a, spermatogonium of an mdund in fhp figure As the with the type number (35) of chromosomes. Ihe chromosomw arc m ine ngure. ^b UlC ^^^^^^ered in pairs from the smallest to the largest. No 18 js the sex ^nprma f O^onial divisions chromosome. B-E, chromosomes of an individual m which one menibor SpermatOgOnidi aiVlblUllb ^^ ^^^ homologous pairs (14 and 16) have become associated ; cVinw -f-ViP oripri'nal linkage matogonium ; C, late prophase I.; D, anaphase I.; h, another view ot SnOW,tne original imKage i^^ bivalent 14-16 • f;G, isolated bivalent and spermatogonial group Wasbetween two Chromo- from an individual in which both members of the two homologous pairs are associated. somes of considerably different sizes, so that a V with unequal limbs is formed. The tetrapartite bivalent at meiosis is formed by the pairing of each limb of this V with its .\ B homologue, and may be represented thus: \^ / (Fig. 68, C). The composite bivalent divides at the points of junction of the homologous. 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, Wilfred Eade, 1882-. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcells, bookyear1920
