| Description | Slide shows diagram of 'sex-linked inheritance in Drosophila' i.e. the fruit fly.
Diagram consists of three levels, labelled from top to bottom, P1, F1 and F2.
In P1and F1 there are two flies, and in F2 there are four. Each level has symbols indicating the characteristics of the white-eyed female and red-eyed male; these symbols are linked across the levels with lines.
Title below images reads: 'Fig. 71. - Sex-linked inheritance in Drosophila. The cross of white-eyed female by red-eyed male, the reciprocal of the cross shown in Fig. 70. Females at left, males at right. (From Morgan, Sturtevant, Muller and Bridges, courtesy Henry Holt & Co.'
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