References
Bateson, W. and Punnett, R. C.,Journ. Genet. Vol. i, 1911.
Punnett, R. C., and Bailey, P. G.,Journ. Genet. Vol. iv, 1914.
Reference
Castle, W. E.,Studies of Heredity in. Rabbits, Rats, and Micc. Publ. No. 288, Carnegie Inst., Wash., 1919.
Reference
Op. cit.
References
A white rabbit with pigmented (blue) eyes is however known: cf.Einführung in dic experimentelle Vererbungslehre, von E. Baur, 2 Aufl. Berlin, 1914, Fig. 28a, p. 75.
The Book of the Babbit, by L. Upcott Gill, 1881, p. 51.
Op. cit. p. 19.
Op. cit. p. 18.
Reference
It would appear from a sentence on p. 16 that Castle does not bind himself by this admission, for he states his opinion here “that dark and tan are allelomorphs but separate in a modified form, one on the whole darker the other on the whole lighter than before they were crossed with each other.”
Reference
Castle regards these grades as generally, if not always, heterozygotes between Dark and White Dutch (op. cit. p. 7), and this is doubtless very often true. Nevertheless I think it equally beyond a doubt that such animals may be homozygous. Indeed Castle probably used such an animal in his experiments. Of the original two Dutch bucks he started with one (♂ 3036) was from his breeding behaviour obviously heterozygous. But the evidence given by Castle strongly suggests that the other (♂ 3037) was not carrying White Dutch. There is no record of his being mated directly to White Dutch, but five of his F1 daughters from self-coloured mothers were mated with oM 3036 (op. cit. Tables 14 and 16) and produced 50 offspring, all of grades 1–9. Had ♂ 3037 been heterozygous it is most likely that some of his tested daughters would have carried White Dutch, and would, when mated with the heterozygous ♂ 3036, have produced some offspring with a grade of pigmentation approximating to White Dutch.
Reference
It is interesting here to recall that Baur obtained F1 animals near Typical Dutch on crossing his blue-eyed whites with albino; cf.Einführung in die experimentelle Vererbungs lehre, 1914, p. 75.
Reference
Cf. Bond, C. J.,Journ. Genet. Vol. ii, 1912, p. 111.
Reference
Probably some were of this constitution, for when crossed with White Dutch a few animals of grades 16 and 17 appeared (cf. Text-fig. 5, p. 15).
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Punnett, R.C. The genetics of the Dutch rabbit—A criticism. Journ. of Gen. 9, 303–317 (1920). https://doi.org/10.1007/BF02983566
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DOI: https://doi.org/10.1007/BF02983566