. Florists' review [microform]. Floriculture. jr Mabch 20, 1913. The Florists^ Review n. Hoose of Carnation The Herald at the Establishment of the Chicago Carnation Ca, Joliet, III. quent generation, wrinkled seeds pro- duced all wrinkled, while twenty-five per cent of the round gave all rounds and the remaining fifty gave wrinkled and round in the same proportion as the F2 generation. From these data Mendel formulated the following nu- merical ratio for the F2 generation of hybrids: 1:2:2, or twenty-five per cent dominants, fifty per cent dominant re- cessives and twenty-five per cent re- ces
. Florists' review [microform]. Floriculture. jr Mabch 20, 1913. The Florists^ Review n. Hoose of Carnation The Herald at the Establishment of the Chicago Carnation Ca, Joliet, III. quent generation, wrinkled seeds pro- duced all wrinkled, while twenty-five per cent of the round gave all rounds and the remaining fifty gave wrinkled and round in the same proportion as the F2 generation. From these data Mendel formulated the following nu- merical ratio for the F2 generation of hybrids: 1:2:2, or twenty-five per cent dominants, fifty per cent dominant re- cessives and twenty-five per cent re- cessives. Explanation of Terms Used. To facilitate further discussion along this line, the algebraic expression R+2RW-f E will be used to denote the numerical value of the hybrids, R denoting round, and W wrinkled, and R W the hybrid between R and W. In the hybrid R W the recessive W is written in the lower case, thus R w. Such an expression always denotes an unexpressed or recessive character. For the purpose of further discussion, it seems desirable to introduce other terms which are inimical to brevity and to clear expression of thought. The first term to be considered is that of the gamete. This term is employed by the biologist to denote the sexual cells of a plant. It is supposed to contain all of the heritable characters of a plant or animal. The fusion of a male and female gamete results in the for- mation of what is technically known as a zygote. If the fusing gametes are of a similar constitution—that is, pos- sessing identical unit characters, as in the case of pure strains of plants—th( resulting zygote is called a homozygote because it possesses a homogeneous constitution. On the other hand, if gametes of unlike constitution fuse With each other the resulting union is called a heterozygote, because it contains un- like opposing characters. Therefore each ovule and pollen grain developed in plants produced from the R w seed would theoretically contain the R and W c
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Keywords: ., bookcentury1900, bookdecad, booksubjectfloriculture, bookyear1912
