. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EXPLANATION OF FIGURES.* " I am indebted to Miss Ruth Lincks for making the drawings for the figures. All figures were drawn to the same scale, with the aid of a camera lucida. Kumbers i and 2 are from diploid cells; numbers 3 to 6 are from tetraploid cells; numbers 2 to 6 are from the same ovary. FIG. i. Typical metaphase (from a spermatogonium) showing the chromo- somes loosely associated in pairs. The smallest pair is the sex chromosome pair'(XY). FIG. 2. Typical prophase (ovarian cell) showing the close association
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EXPLANATION OF FIGURES.* " I am indebted to Miss Ruth Lincks for making the drawings for the figures. All figures were drawn to the same scale, with the aid of a camera lucida. Kumbers i and 2 are from diploid cells; numbers 3 to 6 are from tetraploid cells; numbers 2 to 6 are from the same ovary. FIG. i. Typical metaphase (from a spermatogonium) showing the chromo- somes loosely associated in pairs. The smallest pair is the sex chromosome pair'(XY). FIG. 2. Typical prophase (ovarian cell) showing the close association of homologous chromosomes. FIG. 3. Tetraploid chromosome group in metaphase showing loose associa- tion in fours instead of twos. The four smallest elements are the sex chromo- somes (XXXX). FIG. 4. Late prophase of a tetraploid nucleus showing close association in fours. FIGS. 5 AND 6. Early prophases of tetraploid cells showing intimate associa- tion of homologous chromosomes. nucleus and some of the chromosomes are usually cut in sectioning; but a few nuclei have been found entire, or nearly so. One of these, a metaphase, is represented in Fig. 3. This figure brings out the loose association of chromosomes, characteristic of the. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
