. The physical basis of heredity . Fig. 3. -Cross between splashed-white and black, giving in F\ Andalusian, and in F: onesplashed-wliite, two Andalusian, and one black. MENDELS FIRST LAW 27 strictly only to the hen and to the lower parts of the bodyin the cock whose upper surface is very dark blue oreven black. In this case neither black nor white can be said to bedominant. The blue brought in as splashes by thesplashed-white might indeed be regarded as dominant overthe black of the other (black) parent, but if so, then theuniform distribution of the blue must be determined bydominance of the
. The physical basis of heredity . Fig. 3. -Cross between splashed-white and black, giving in F\ Andalusian, and in F: onesplashed-wliite, two Andalusian, and one black. MENDELS FIRST LAW 27 strictly only to the hen and to the lower parts of the bodyin the cock whose upper surface is very dark blue oreven black. In this case neither black nor white can be said to bedominant. The blue brought in as splashes by thesplashed-white might indeed be regarded as dominant overthe black of the other (black) parent, but if so, then theuniform distribution of the blue must be determined bydominance of the allelomorphic gene brought in by theblack parent. Each parent then would contribute at thesame time a dominant and a recessive effect, each theproduct of one member of the same pair of allelomorphs. There are other cases in which the hybrid is inter-mediate in color, and, in addition, its range of variationis so large that the extremes overlap one or even bothof the two parental types. For example: In the vinegarfly, Drosophila m
Size: 1482px × 1686px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectheredit, bookyear1919
