Cross-section

Definition and stakes

Portrait of Émile Zola Émile Zola,  Doctor Pascal

“ Then there are the three cases of crossing: by conjugation, Ursule, Aristide, Anna, Victor; by dissemination, Maxime, Serge, Étienne; by fusion, Antoine, Eugène, Claude. I even noted a fourth case, a very remarkable one, an even cross, Pierre and Pauline; and varieties are established, the differentiation of the mother, for example, often accords with the physical resemblance of the father; or, it is the contrary which takes place, so that, in the crossing, the physical and mental predominance remains with one parent or the other, according to circumstances. ”
Source: Gutenberg

Various,  Popular Science Monthly (1914)

“ Expressed in percentages the crossing over takes place in 1.3 per cent, of the total number of males produced.
The hypothesis of independent assortment for two pairs of characters calls for equal numbers in each of the four classes of males in the cross just given.
”
Source: Wikisource

W.H.R.Rivers,  Kinship and social organisation (1914)

“ Through the cross-cousin marriage the relationships of mother's brother, father's sister's husband and father-in-law will be combined in one and the same person, and the relationships of father's sister, mother's brother's wife and mother-in-law will be similarly combined. ”
Source: Wikisource

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