Heredity in the light of recent research / by L. Doncaster.

  • Leonard Doncaster
Date:
1912
Catalogue details

Licence: In copyright

Credit: Heredity in the light of recent research / by L. Doncaster. Source: Wellcome Collection.

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    variation hitherto considered. It is possible that dimorphic cases in which intermediates exist are really essentially discontinuous, but that the two groups into which the species is divided each exhibit continuous variation about the mode for the group, to such an extent that the higher members of one Fig. 5. Curve with two modes, representing frequency of lengths of forceps of male Earwigs from the Fame Islands. (After Bateson.) group overlap the lower of the other. For example, if the modal (most frequent) stature for a race of men were 68 inches, and for the women 62 inches, it might happen that on plotting a frequency curve for the stature of adults including both sexes, a curve 2 D.