Body-build and its inheritance

Metadata

Gutenberg ID

78107

Title

Body-build and its inheritance

Language

en

Book source

Project Gutenberg

Description max 80 words

Charles Benedict Davenport investigates the genetic basis of human body-build, challenging the notion that physique is solely a result of diet and activity. Drawing on extensive family data collected during World War I, this study explores how heredity influences physical traits like height, weight, and chest girth across generations.

Summary up to 500 words

In *Body-build and its Inheritance*, Charles Benedict Davenport investigates the genetic foundations of human physique, challenging the prevailing physiological view that variations in body type are solely the result of diet and activity. Drawing on data from thousands of young men examined during World War I, Davenport highlights the extraordinary diversity in human build and questions whether heredity plays a significant role. Utilizing extensive family records from the Eugenics Record Office, he conducts detailed pedigree analyses to trace the inheritance of build characteristics across generations. Davenport formulates hypotheses using Mendelian language to explain observed patterns, moving beyond pre-Mendelian mass statistics to predict filial traits. He examines specific matings, such as those between slender and fleshy parents, to observe how traits are passed down. For instance, in families where both parents are slender, the offspring are predominantly slender, though some may fall into a medium category. Conversely, in matings involving one slender and one very fleshy parent, children often exhibit a range of builds, sometimes resembling one parent and sometimes showing intermediate characteristics. Davenport notes that while some matings result in offspring heavier than either parent, suggesting hybrid vigor, this is rare. The text includes detailed measurements in both English and metric systems, discussing the stability of build indices over time and the influence of factors like race, occupation, and disease. Davenport emphasizes that while environmental conditions affect build, the underlying genetic factors are substantial. The book serves as a foundational text for understanding the complex interplay between heredity and environment in determining human body type, providing a substantial overview of early genetic research into human physique. Through rigorous analysis of critical cases and family histories, Davenport establishes a framework for understanding how physical traits are inherited, laying the groundwork for future studies in human genetics.

LLM editorial rating

4.2/5

Download URL

https://www.gutenberg.org/ebooks/78107.epub.noimages

Local file path

data/epubs/pg78107.epub

Removed after upload

Downloaded at

2026-07-01 16:52 UTC

Categories

• Science
• Biology