Studies in Spermatogenesis ...Carnegie Institution of Washington, 1906 |
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19 chromosomes 27 large chromosomes a₁ accessory anaphase Anasa Aphrophora quadrangularis bouquet stage chro chromatin nucleolus classes Coccinellida containing Coptocycla cysts daughter plates deeply staining dumb-bell egg follicle elongated equal pair equatorial plates germ cells growth stages figs Hemiptera Hemiptera heteroptera Hemiptera homoptera hetero heterochro heterochromosome group heterochromosome pair heteroptera idiochromosomes iron-hæmatoxylin large plasmosome larger heterochromosome larvæ Lepidoptera loops m-chromosomes maturation mitosis metaphase mitosis mosomes nucleus number of chromosomes odd chromosome Odontota dorsalis oöcytes oögonia ordinary chromosomes Orthoptera pair of chromosomes pair of heterochromosomes plate from egg plate of spermatogonium PLATE VIII prophase safranin-gentian preparation Second spermatocyte sex characters sex chromosome sex determination showing the heterochromosome shown in figure small chromosome small heterochromosome smaller somatic cells somatic number species of Coleoptera sperm head sperma spermatids spermato spermatocyte spindle spermatogenesis spermatozoa spireme stage STEVENS synapsis stage synizesis stage telophase Tenebrio molitor tetrads Trirhabda canadense unequal pair Zoöl
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Página 33 - STUDIES IN SPERMATOGENESIS.—II. A COMPARATIVE STUDY OF THE HETEROCHROMOSOMES IN CERTAIN SPECIES OF COLEOPTERA, HEMIPTERA, AND LEPIDOPTERA, WITH ESPECIAL REFERENCE TO SEX DETERMINATION. By NM STEVENS.
Página 58 - 03. The chromosomes in heredity. Biol. Bull., vol. 4, no. 5. WILSON, EB '05. Studies on chromosomes. I. The behavior of the idiochromosomes in Hemiptera. Journ. Exp. Zool., vol. 2,
Página 57 - 99. The spermatogenesis of Anasa tristis. Journ. of Morph., vol.