. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. HEREDITY 313 SPERM A TO GENESIS DIVISION PERIOD GROWTH PERIOD SYNAPSIS IsT MATURATION DIVISION CHROMOSOMES REDUCED TO HAPLOID NUMBER. ^NO MATURATION DIVISION. PRIMORDIAL GERM CELL {DIPLOID CHROMOSOME NUMBER) SPERMATOGONIA SPERMATOCYTE 1 SPERMATOCYTE H SPERMATIDS SPERM A TOZOA FiG, 201.—Diagram of the maturation of spermatozoa. Note the-two types of sperms, one with and one without an X chromosome. One of each type is introduced in Fig. 203. For convenience the Y chromosome is Please
. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. HEREDITY 313 SPERM A TO GENESIS DIVISION PERIOD GROWTH PERIOD SYNAPSIS IsT MATURATION DIVISION CHROMOSOMES REDUCED TO HAPLOID NUMBER. ^NO MATURATION DIVISION. PRIMORDIAL GERM CELL {DIPLOID CHROMOSOME NUMBER) SPERMATOGONIA SPERMATOCYTE 1 SPERMATOCYTE H SPERMATIDS SPERM A TOZOA FiG, 201.—Diagram of the maturation of spermatozoa. Note the-two types of sperms, one with and one without an X chromosome. One of each type is introduced in Fig. 203. For convenience the Y chromosome is 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 Buchanan, James William, 1888-. New York, London, Harper & brothers
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Keywords: ., bookcentury1900, bookpubl, booksubjectbiology, booksubjectzoology
