File:Rugh 055.jpg
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Fertilization of the Frog's Egg
(A) Sperm penetration and copulation paths in the same direction, forming a straight line, in which case the first cleavage bisects the gray crescent.
(B) Sperm copulation path veers away from the penetration path, causing the first cleavage furrow to deviate from bisecting the gray crescent.
(C) Under compression, the egg protoplasm is re-oriented, and the cleavage spindle comes to lie in the plane of the longest protoplasmic axis, regardless of sperm activity.
(D) Profile view showing slight movement of the egg nucleus toward the sperm nucleus, after the egg nucleus has given off its second polar body.
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Reference
Rugh R. Book - The Frog Its Reproduction and Development. (1951) The Blakiston Company.
Cite this page: Hill, M.A. (2024, April 27) Embryology Rugh 055.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Rugh_055.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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