. Plant genetics . Heredity; Mendel's law; Plant breeding. 92 Plant Genetics considered no such case, but linkage involves this situa- tion. In connection with some of Mendel's original crosses fig. 24 will be recalled. In this case a double dominant mates with a double recessive, and the result is a dihybrid ratio in the F2 generation. Suppose, however, that determiner T and determiner 5 are on the same chromosome, the situation would be as represented. Dwarf Wrinkled Parent 4 Possible Gametes .-. ¥, Shows 9:3 :3 :1 RaUo Fig. 24.—Diagram showing normal dihybrid behavior when no linkage is inv
. Plant genetics . Heredity; Mendel's law; Plant breeding. 92 Plant Genetics considered no such case, but linkage involves this situa- tion. In connection with some of Mendel's original crosses fig. 24 will be recalled. In this case a double dominant mates with a double recessive, and the result is a dihybrid ratio in the F2 generation. Suppose, however, that determiner T and determiner 5 are on the same chromosome, the situation would be as represented. Dwarf Wrinkled Parent 4 Possible Gametes .-. ¥, Shows 9:3 :3 :1 RaUo Fig. 24.—Diagram showing normal dihybrid behavior when no linkage is involved. in fig. 25. This is linkage; that is, with two determiners a monohybrid ratio instead of a dihybrid ratio is obtained. Morgan's definition is as follows: "When factors lie in different chromosomes they give the Mendehan expectations; but when factors lie in the same chromosome they may be said to be linked, and they give departures from the Mendelian ; It will be noted that this conception rests upon the belief that the chromosome is the indivisible unit in inheritance, a conception that seems, to have been justified by most of the breeding results and which conforms to Mendelian 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 Coulter, John Merle, 1851-1928; Coulter, Merle C. (Merle Crowe), 1894-1958. Chicago : The University of Chicago Press
Size: 2622px × 953px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherchicagotheuniversi
