The genetics of the budgerigar / by F. A. E. Crew and Rowena Lamy.

  • Crew, F. A. E. (Francis Albert Eley), 1888-1973.
Date:
[1935]
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: The genetics of the budgerigar / by F. A. E. Crew and Rowena Lamy. Source: Wellcome Collection.

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    convenient to give the genetic formula for Dark green. A genetic formula, it must be noted, presents only those genes which differ from the wildtype light green, and we therefore represent a Dark green bird simply as ^ indicating that the Dark Green Light Green Pi gametes of P x fertilisation Fi dark greens 50 per cent Fig. 2. light greens 50 per cent only difference between it and the wildtype is that it possesses, instead of two light genes, one light and one Dark. The next mating to be considered is that of Dark green by Dark green. In this case the germ cells of both parents are of two kinds, one carrying Dark and one light (Fig. 3).