. Animal biology. Zoology; Biology. ? ? X Black BB albino bb Black Bb X Gametes Of? Fj ® ®. Black Bb Black BB Black Bb Black Bb r y albino bb •2 V) I Fig. 324.—Diagram showing the results of crossing two guinea piga differing by one character and each homozygous for that character, and the checkerboard showing the results in the Fi generation. (From sketches by D. D. Whitney.) the union of sex cells two A's may be brought together, or two a's, or an A may be united with an a. The individuals with two A's and those with two a's are homozygous, while those with A and a are heterozygous or hybrid
. Animal biology. Zoology; Biology. ? ? X Black BB albino bb Black Bb X Gametes Of? Fj ® ®. Black Bb Black BB Black Bb Black Bb r y albino bb •2 V) I Fig. 324.—Diagram showing the results of crossing two guinea piga differing by one character and each homozygous for that character, and the checkerboard showing the results in the Fi generation. (From sketches by D. D. Whitney.) the union of sex cells two A's may be brought together, or two a's, or an A may be united with an a. The individuals with two A's and those with two a's are homozygous, while those with A and a are heterozygous or hybrid for this pair of characters and will show the dominant character. These symbols being placed in circles corresponding to the cells, the facts may be fitted into diagrams showing oogenesis, spermatogenesis, and fertilization in successive generations as indicated in the accompanying schemes (Fig. 323). From these schemes it is apparent how segregation, which is the development of homozygous individuals by the breeding together of hybrids, is brought about. In the discussion of these succes- sive generations it is usual to refer to the generation which forms the starting point as the P (parental) generation; the first generation pro-. 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 Wolcott, Robert Henry, 1868-1934. New York ; London : McGraw-Hill Book Company, Inc.
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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
