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Title Exploring human heredity
Subject Heredity, Human; Medical genetics; Adaptation (Biology)
Description Twentieth Annual Frederick William Reynolds Lecture.
Creator Stephens, Fayette Ellsworth, 1890-
Publisher Extension Division, University of Utah
Date 1956-01-16
Date Digital 2008-05-29
Type Text
Format image/jpeg
Digitization Specifications Original scanned on Epson Expression 10000XL flatbed scanner and saved as 400 ppi uncompressed tiff. Display images generated in PhotoshopCS and uploaded into CONTENTdm Aquisition Station.
Resource Identifier http://content.lib.utah.edu/u?/reynolds,362
Source LD5526 .U8 n.s. v.47 no.11
Language eng
Relation Digital reproduction of "Exploring human heredity" J. Willard Marriott Library Special Collections
Rights Digital Image Copyright University of Utah
Metadata Cataloger Seungkeol Choe; Ken Rockwell
ARK ark:/87278/s64q7rxv
Setname uu_fwrl
Date Created 2008-07-29
Date Modified 2008-07-31
ID 319670
Reference URL https://collections.lib.utah.edu/ark:/87278/s64q7rxv

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Title Page30
Description 30 TWENTIETH ANNUAL REYNOLDS LECTURE gene concerned, however, did more than produce polyposis. It produced an entire syndrome. Fatty tumors and bony osteomas also appeared in affected individuals. If these traits occurred without polyps, it was in young people who would probably develop the polyps at a later date. In the second kindred, polyposis was produced in the same manner as in the first, except that there were no fatty tumors or osteomas. Here we have what seems to be the same gene producing different effects in different kindreds. We do not know for sure, however, that it is the same gene acting in both kindreds, and it is a very difficult thing to find out because it is impossible to secure the necessary human test crosses. So far, we have little evidence that lung cancer is hereditary. Evidence is accumulating, however, which shows that tobacco smoke may be an important environmental factor in the production of this type of cancer. The work of several investigators, both in this country and in Europe, shows a significant increase in the number of heavy smokers found among lung cancer patients as compared to a control made up of non-cancer patients. It is interesting to note that radiation and chemicals which tend to produce mutations also are factors in cancer production. In the light of present evidence, it would seem that only in the case of a few rare types of cancer does heredity play a major role. In other types, both genetic and non-genetic factors are important. Non-genetic factors may depend upon the genetic makeup of the individual just as the genetic makeup of the individual may depend upon environmental factors for the production of cancer. There seems to be an interaction between hereditary and environmental factors which varies with different individuals and with different types of cancer. With the exception of these few rare types of cancer, it is doubtful if we have sufficient data to warrant advising anyone not to marry because of the hereditary risk of developing cancer. However, the data may stimulate individuals to be more cautious and check more frequently with their doctors for the presence of malignant growths. Mental Traits The inheritance of mental traits is one of the most difficult problems in human genetics to investigate. It is hard, not only because the human element involved makes it very difficult to collect data,
Format image/jpeg
Identifier 030-RNLT-StephensF_Page30.jpg
Source Original Manuscript:Exploring human heredity by Fayette E. Stephens.
Setname uu_fwrl
Date Created 2008-07-29
Date Modified 2008-07-29
ID 319664
Reference URL https://collections.lib.utah.edu/ark:/87278/s64q7rxv/319664