منابع مشابه
The biology of spermatogenesis: the past, present and future.
The physiological function of spermatogenesis in Caenorhabditis elegans, Drosophila melanogaster and mammals is to produce spermatozoa (1n, haploid) that contain only half of the genetic material of spermatogonia (2n, diploid). This half number of chromosomes from a spermatozoon will then be reconstituted to become a diploid cell upon fertilization with an egg, which is also haploid. Thus, gene...
متن کاملAN ULTRASTRUCTURAL STUDY OF PLANT SPERMATOGENESIS Spermatogenesis in Nitella
Spermatogenesis in the charophyte Nitella has been followed in antheridia prepared for light and electron microscopy. The antheridial filament cells contain paired centrioles which are similar in structure and behavior to the centrioles of animal cells. In the early spermatid, the centrioles undergo an initial elongation at their distal ends and become joined by a spindle-shaped fibrous connect...
متن کاملSpermatogenesis, Overview
treatments with secretion of female accessory gland and micropyle cap substance. Int. J. Insect Morphol. Embryol. 14, 381391. Engelmann, F. (1970). The Physiology of Insect Reproduction. Pergamon, New York. Gillett, C. 0 988). Arthropoda-Insecta. In Reproductive Biology of invertebrates. Vol III. Accessory Sex Glands. (K. G. and R. G. Adiyodi, Eds.), pp. 319-471. Wiley, New York. Gillott, C. (1...
متن کاملReview: Genetics of Spermatogenesis
Development of mammals is usually initiated by fertilization of an egg by a sperm. The sperm and the egg have distinct roles to play in launching development of a new generation. The sperm must seek out the egg, fuse with it and deliver its precious haploid nucleus. The egg, on the other hand, must make itself apparent to the sperm and be capable of responding appropriately to its contact. That...
متن کاملDisorders of spermatogenesis
Zusammenfassung medgen 2018 · 30:12–20 https://doi.org/10.1007/s11825-018-0181-7 © The Author(s) 2018. This article is an open access publication. F. Tüttelmann · C. Ruckert · A. Röpke Disorders of spermatogenesis. Perspectives for novel genetic diagnostics after 20 years of unchanged routine
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ژورنال
عنوان ژورنال: Seminars in Cell & Developmental Biology
سال: 2014
ISSN: 1084-9521
DOI: 10.1016/j.semcdb.2014.04.031