File:Morgan 1925 fig35.jpg

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Fig. 35. Diagram illustrating the two maturation divisions of the egg

In a the polar spindle is present at the periphery of the egg. The three pairs of chromosomes (bivalents) are represented in black and white; the white being the paternal and the black the maternal. In b the conjugating chromosomes have separated and are moving to the poles. In c the first polar body has been given off, leaving three single chromosomes in the egg. In c these have split lengthwise and lie off the equator of a new spindle. In e the daughter chromosomes have separated and moved to opposite poles. In / the second polar body has been given off and the first polar body has divided. Three single chromosomes are left in the egg.


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Evolution and Genetics: 1 Different Kinds of Evolution | 2 Four Great Historical Speculations | 3 Evidence for Organic Evolution | 4 Materials of Evolution | 5 Mendel's Two Laws of Heredity | 6 Chromosomes and Mendel’s Two Laws | 7 Linkage Groups and the Chromosomes | 8 Sex-Linked Inheritance | 9 Crossing-over | 10 Natural Selection and Evolution | 11 Origin of Species by Natural Selection | 12 Non-Inheritance of Acquired Characters | 13 Human Inheritance | Figures

Reference

Morgan, T. H. (1925). Evolution and genetics. Princeton: Princeton University Press.


Cite this page: Hill, M.A. (2024, April 25) Embryology Morgan 1925 fig35.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Morgan_1925_fig35.jpg

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