. Nature and development of plants. Botany. NATURE OF PLANTS 139 from one another in one or more factors. If now one of the hybrid four-o'clocks is crossed with the pure white, one half of the resulting offspring will be pure white and one half pink like the original hybrid. The reason for this variation in the offspring will be apparent by studying the diagram, Fig. 86A. Here we see that each parent {RR and WW) produced gametes having the same color factor as itself and when two gametes Tfea. Tcirents rinJc Hybrid -> iR W) Crametes o/^ \ /C!r\ ^^N *»aj' /natecC J ^tvMtefr/n^(y\^ (y^ 0//jMn
. Nature and development of plants. Botany. NATURE OF PLANTS 139 from one another in one or more factors. If now one of the hybrid four-o'clocks is crossed with the pure white, one half of the resulting offspring will be pure white and one half pink like the original hybrid. The reason for this variation in the offspring will be apparent by studying the diagram, Fig. 86A. Here we see that each parent {RR and WW) produced gametes having the same color factor as itself and when two gametes Tfea. Tcirents rinJc Hybrid -> iR W) Crametes o/^ \ /C!r\ ^^N *»aj' /natecC J ^tvMtefr/n^(y\^ (y^ 0//jMn$rVR wj W^ct^ Tink ^" Fig. 864. Diagram showing distribution of the factors for red (i?) and for white (WO in the cross of the red and white four-o'clock; and the subsequent cross of the pink hybrid with the white form. derived from these parents unite the resulting hybrid [RW) must contain the color factors of both parents. Note, however, that the hybrid produces gametes like those of the parents, i. e., gametes with the red factor or with the white factor. This is due to the fact that in the formation of the gametes there is a sepa,rating out of the factors so that the gametes are never, hybrid. They only contain the factors of one or the other of the original parents. The lower part of the diagram shows how. 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 Curtis, Carlton Clarence, 1864-1945. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectbotany
