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Titlebook: Intersexuality in the Animal Kingdom; Rudolf Reinboth Book 1975 Springer-Verlag Berlin · Heidelberg 1975 biology.endocrinology.genetics.re

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书目名称Intersexuality in the Animal Kingdom
编辑Rudolf Reinboth
视频videohttp://file.papertrans.cn/473/472882/472882.mp4
图书封面Titlebook: Intersexuality in the Animal Kingdom;  Rudolf Reinboth Book 1975 Springer-Verlag Berlin · Heidelberg 1975 biology.endocrinology.genetics.re
描述When Richard Goldschmidt‘ coined the term "intersexuality" in 1915, he intended it to apply to normally dioecious species which exhibit some kind of mixture between male and female characters. However, as knowledge of the bewildering variability present in the sexual orga­ nization of members of the animal kingdom has increased, the original meaning of the word has changed. Today many authors define inter­ sexuality as "the presence of both male and female characteristics, or of intermediate sexual characteristics, in a single individual".2 This more extensive and widely accepted concept justifies the title of our book •. Among all the anatomical and physiological features of living organisms the reproductive system has a unique importance for the perpetuation of the species. Conversely, reproductive processes are of little or no account for the viability of the individual. Therefore, within the framework of general biology reproduction has all too often been looked at solely from the point of view of genetics. Lively discussions about genotypic versus phenotypic sex determination long dominated the sci­ entific literature on sexuality in animals; this one-sided emphasis has tended
出版日期Book 1975
关键词biology; endocrinology; genetics; reproduction; reproductive system; system
版次1
doihttps://doi.org/10.1007/978-3-642-66069-6
isbn_softcover978-3-642-66071-9
isbn_ebook978-3-642-66069-6
copyrightSpringer-Verlag Berlin · Heidelberg 1975
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Sexual Differentiation in the Fissiparous Strain of ,e first generally takes place in winter, agamic reproduction in summer. Fissions may cease during sexual activity. For some species, especially . and ., two strains can be distinguished, one in which both sexual and fissiparous individuals alternate regularly and an exclusively fissiparous strain.
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Sexuality and Neurosecretion in Freshwater Planarians posterior body thirds of an asexual planarian, has been demonstrated by Kenk (1941) and Okugawa (1957). The investigations of Lender (1952) have shown the morphogenetic influence of the cerebral plexus for the regeneration of ocular spots in planarians.
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Sex Differentiation in Regenerating ♂/♀ Nemertine Chimerasate phylum of Nemertinea: the natural and functional intersexuality (or bisexuality) in hermaphroditic worms and the abnormal, pathological or experimental, intersexuality (or sex reversal stage) in dioecious animals.
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Factors of Primary Sexual Differentiation in the Simultaneous Hermaphrodite , (Oligochaeta: Lumbriciale differentiation of the germ-cells depends on an androgenic factor (hormone), while female differentiation occurs spontaneously when the androgenic factor is absent or insufficient. This hypothesis has been checked with some gonochoristic and hermaphroditic invertebrates.
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Parasite-Induced Castration and Intersexuality in Insects. Whereas in the first of these factors we are concerned with specific chemical substances, and in the second with a single abiotic environmental component, the third factor is a living organism with a multitude of individual metabolic demands and metabolic achievements.
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