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Fig. 7. Reduction of chromosomes in spermatogenesis in Ascaris megalocephala (bivalens)

Brauer, Wilson.

A - G Successive stages in the division of the primary spermatocyte.

The original reticulum undergoes a very early division of the chromatin granules which then form a doubly split spireme (B). This becomes shorter (C), and then breaks in two to form the 2 tetrads (D, in profile, E, on end). F, G, H, First division to form 2 secondary spermatocytes, each receiving 2 dyads. I, Secondary spermatocyte. J, K, The same dividing. L, Two resulting spermatids, each containing 2 single chromosomes.

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Reference

Bailey FR. and Miller AM. Text-Book of Embryology (1921) New York: William Wood and Co.

Cite this page: Hill, M.A. (2024, April 18) Embryology Bailey007.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey007.jpg

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+==Fig. 7. Reduction of chromosomes in spermatogenesis in Ascaris megalocephala (bivalens)==
+Brauer, Wilson.
+A - G Successive stages in the division of the primary spermatocyte.
+The original reticulum undergoes a very early division of the chromatin granules which then form a doubly split spireme (B). This becomes shorter (C), and then breaks in two to form the 2 tetrads (D, in profile, E, on end). F, G, H, First division to form 2 secondary spermatocytes, each receiving 2 dyads. I, Secondary spermatocyte. J, K, The same dividing. L, Two resulting spermatids, each containing 2 single chromosomes.
 {{Template:Bailey 1921 Figures}}
+[[Category:Spermatozoa]]