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Biol Bull 51: 225-236. (October 1926)
© 1926 Marine Biological Laboratory
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GENETIC STUDIES IN POULTRY

I. THE SEX RATIO IN THE DOMESTIC FOWL

W. V. LAMBERT and C. W. KNOX

1. The sex ratio for 2,910 chicks and embryos examined was 51.13.

2. The sex ratio for total living chicks was 50.97, for embryos dying between the eighteenth and twenty-first days of incubation 50.06, and for embryos dying between the twelfth and eighteenth days 55.82 per cent.

3. No tendency for an increase or a decrease in the sex ratio as the hatching season progressed was noted.

4. The sex ratio of hybrid birds is approximately the same as for that of the pure breeds observed.

5. No relationship between the sex ratio and the factors of mean individual egg weight, antecedent egg production, and actual egg production during the hatching season is apparent.






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Copyright © 1926 by the Marine Biological Laboratory.