. The biology of spiders. Spiders; Insects. Fig. 92.—Scheme showing relation between dimorphic forms of male Maevia vittata and the chromosomes of the gametes. Circles, gametes ; squares, zygotes. This work of Painter's is of particular interest since it illustrates, for the first time among spiders, that the chromosomes influence the sex and appearance of the individual and its offspring. Abnormalities in Development—Gynandry It is a familiar fact that the customary distinction between male and female organisms is absent from some animals, such as earth worms and snails. These are hermaphrodi
. The biology of spiders. Spiders; Insects. Fig. 92.—Scheme showing relation between dimorphic forms of male Maevia vittata and the chromosomes of the gametes. Circles, gametes ; squares, zygotes. This work of Painter's is of particular interest since it illustrates, for the first time among spiders, that the chromosomes influence the sex and appearance of the individual and its offspring. Abnormalities in Development—Gynandry It is a familiar fact that the customary distinction between male and female organisms is absent from some animals, such as earth worms and snails. These are hermaphrodites, and are able to produce both ova and spermatozoa. Hermaphroditism is unknown among spiders, but the term is sometimes misapplied to abnormal specimens which unite in their bodies some of the characters of both sexes. Such freaks are properly described as gynandro- morphs, the distinction being that hermaphrodites are normal and functional members of their race, while. 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 Savory, Theodore Horace, 1896-. London : Sidgwick & Jackson
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecti, booksubjectspiders
