The cause and control of sex in human offspring.

  • Jackson, R. Clay.
Date:
1926
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Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: The cause and control of sex in human offspring. Source: Wellcome Collection.

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    124 The Cause and Control of Sex The exposure as a result of their occupations was equal for them. Complexions practically cancel and a pre¬ ponderance of weight determined the issue for the father. 240. Case 17. The father had been in greenhouse work for nine years. He weighed 165 pounds. He had dark hair and blue eyes. The mother's weight was 110 pounds; she was a brunette. The occupation of the father seems to be the only factor to be considered in this case. One girl was born. 241. Case 18. The father had always been in this kind of work. His weight was 140 pounds. He was a blond with blue eyes. The mother weighed 115 pounds and was a medium brunette. One boy was born to them. 242. Case 19. The only occupation of the father was that of a worker in a greenhouse. He weighed 175 pounds, had medium dark hair and hazel blue eyes. The mother's weight was 130 pounds; her complexion and eyes were of the same type as the father's. The issue were 3 Girls. 243. Case 20. The father was a worker in the greenhouse and had been during all of his working life. He weighed 138 pounds; he was a blond with blue eyes. The mother's weight was 120 pounds ; she was somewhat darker in complexion but her eyes were blue. Born 2 Girls (one dead). 244. Case 21. The father had always been in the greenhouse work. The mother had worked at his side in the same occupation. She was always in good health. The father's weight was 160 pounds. He had dark hair and brown eyes. The mother weighed 130 pounds. Her complexion was of the same type as that of the father. There were born 5 Boys 3 Girls.