Heat generated by radio-active substances

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ID: 306933
1911
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Abstract
IN cultures of Drosophila ampelophila, that had been closely inbred for a year, a male fly, lacking the red pigment of the eye, appeared. The same stock has continued to produce these white-eyed mutants always of the male sex. A white-eyed father transmits the character to about one fourth of his grandsons, but to none of his granddaughters. In this sense the character is sex limited. The white eye can be transmitted, however, to the females, most readily by breeding any whiteeyed male to red hybrids (F1) out of white by red. White-eyed males and females give pure stock. When a white-eyed female is bred to l e ; a si ilar account of l; escriptions of the termitoa as ann; a description ( r ecophila escherichi) ter itophilous, by Schimil s t sanura, yriopoda la ae b Silvestri; a termito( otoscolex ter iticola) . any wild male all of the female offspring have red eyes and all of the male offspring white eyes. The result shows that the male-bearing sperm of the wild flies lacks at least one of the factors essential for the production of red eyes. This statement does not mean that the male-determining sperm lacks all of the factors essential for producing red, but only that it lacks one of the factors necessary for the production of red. In fact, it is conceivable that all of the rest of the cell may be equally essential for the production of red, but in the absence of one condition (factor) the red fails to develop. It is in this sense that I understand the use of the word factor in inheritance; and in the same sense one might employ the word unit character, although the latter word may seem to imply (from usage) that a particular character is represented entirely by some unit in the germ cells. We are not warranted, I believe, in extending to the results of Mendelian inheritance such an interpretation: Since I have discussed elsewhere the mode of transmission of the white eyes,1 I shall omit further details here.
Reference Key
openalex_W2321349700 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors W. Duane
Journal american journal of science
Year 1911
DOI
10.2475/ajs.s4-31.184.257
URL
https://doi.org/10.2475/ajs.s4-31.184.257
Keywords Keywords not found

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