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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 Page11
Description EXPLORING HUMAN HEREDITY 11 parents. This might be illustrated by a four-legged table. If you break one leg the table falls down. When you repair the leg the table stands up. It is not a sound conclusion, however, to say that the leg in question is what holds the table up. There are three other legs just as important as the one which happened to be broken. Inheritance of Human Traits The part heredity plays in the transmission of human traits can be best understood by reviewing some specific examples. This we will now do, using, so far as possible, studies made in our own laboratory, inasmuch as we are more familiar with this work. First let us take a trait known as Achondroplasia, a form of dwarfing probably produced by some defect in the endocrines. A large kindred (a family group usually tracing back to a common ancestor) showing this trait was studied by the family history or pedigree method. Figure 1 shows an individual affected with this trait. Affected individuals range in height from 53 to 59x/2 inches. The long bones of the arms and legs are shortened, while the I trunk is of normal size. The legs â-  are generally bowed, and an af- I fected individual walks with a I waddling gait. The pedigree or family history of the kindred is shown in Figure â-  2. The circles represent females I and the squares represent males. The darkened areas represent af- I fected individuals. From this chart we can draw certain conclusions about the inheritance of this trait. (1) With the exception of the original affected individual, the trait never occurs in a child unless l it also occurs in one of the parents. -' 1 (2) Approximately one-half of the |;: ;\:- ' T: children of affected parents show Figure l
Format image/jpeg
Identifier 011-RNLT-StephensF_Page11.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 319645
Reference URL https://collections.lib.utah.edu/ark:/87278/s64q7rxv/319645