. Embryology. Embryology; Embryology; genealogy. SEX DIFFERENTIATION 305 abruptly and finally dies. The death cannot be caused by a lack of chromo- somes, since the egg containing half the normal number will develop beyond gastrulation. Therefore death must be caused by an abnormal combination of the chromosomes of the two species. With this discussion of the maturation of the germ cells and the fertiliza- tion of the egg we have completed a cycle of development. The newly fertilized eggs develop with the general characteristics of the species, al-. 9 DIFFERENT COMBINATIONS Fig. 194. Maturatio
. Embryology. Embryology; Embryology; genealogy. SEX DIFFERENTIATION 305 abruptly and finally dies. The death cannot be caused by a lack of chromo- somes, since the egg containing half the normal number will develop beyond gastrulation. Therefore death must be caused by an abnormal combination of the chromosomes of the two species. With this discussion of the maturation of the germ cells and the fertiliza- tion of the egg we have completed a cycle of development. The newly fertilized eggs develop with the general characteristics of the species, al-. 9 DIFFERENT COMBINATIONS Fig. 194. Maturation of the germ cells and the combinations of chromosomes at fertilization. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Barth, Lester G. (Lester George), 1905-1979. New York, Dryden Press
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Keywords: ., boo, bookcentury1900, booksubjectembryology, booksubjectgenealogy
