. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. HEREDITY 333 cleanly after synapsis and a fragment of one may remain attached to the other. Offspring from such gametes show either the total M A B C D U A \B C \0 SPERM A TOGONIUM. SYNAPSIS IN PRIMARY SPERMATOCYTE AFTER REDUCTION DIVISION] ONE IN EACH SECONDARY SPERMATOCYTE. Fig. 208.—Diagram illustrating a simple case of an interchange of materials be- tween two homologous chromosomes during synapsis. Obviously, all genes, such as C, D, and c, d, that are detached and assumed by the synapti
. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. HEREDITY 333 cleanly after synapsis and a fragment of one may remain attached to the other. Offspring from such gametes show either the total M A B C D U A \B C \0 SPERM A TOGONIUM. SYNAPSIS IN PRIMARY SPERMATOCYTE AFTER REDUCTION DIVISION] ONE IN EACH SECONDARY SPERMATOCYTE. Fig. 208.—Diagram illustrating a simple case of an interchange of materials be- tween two homologous chromosomes during synapsis. Obviously, all genes, such as C, D, and c, d, that are detached and assumed by the synaptic mate are passed into the succeeding generation together. Likewise all genes located in regions not de- tached, such as A, B, and a, b, are inherited together. absence of a character, or else an exaggeration of the character. This appears to be the cytological basis of one class of 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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