J. W. Heslop Harrison
Articles written in Journal of Genetics
Volume 8 Issue 4 September 1919 pp 259-265
Volume 9 Issue 1 December 1919 pp 1-38
Volume 9 Issue 1 December 1919 pp 39-52
Volume 9 Issue 3 February 1920 pp 195-280
Volume 10 Issue 1 July 1920 pp 61-85
Volume 13 Issue 3 November 1923 pp 333-352
Further investigations into the inheritance of melanism in the interspecific crosses between
Unlike what occurred in the early cross, no great spread of variation was encountered in the F2 insects.
Instead of types and melanics the F2 brood included types, streaks (mosaics) and melanics.
The character “streak,” when tested by means of breeding experiments, proved to form, with melanism and type, a series of multiple allelomorphs with three members.
Streak is dominant to type and recessive to melanism.
This character originated through a degradation of the gene for melanism during interspecific crossing.
Unit-characters are therefore not constant under all conditions.
In the cross between
Certain back crosses between (
Volume 17 Issue 1 August 1926 pp 1-9
In interspecific crosses between
Similarly, in back crosses between bistortata females and the two possible
No disturbances of the sex ratio arise in the
Volume 27 Issue 2 May 1933 pp 225-232
1. Experiments designed to hybridise the Geometrid species
2. Only the reciprocal pairings between
3. These resulted in both cases in hybrid males, but from the mating of
4. With the knowledge that the ova from virgin
5. The chromosome numbers in
6. On the basis of the whole of the facts observed during the work a phylogenetic tree is suggested for the two genera.
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