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Weights of some internal organs and glands of fully developed parthenogenetic and normal turkey embryos.

Abstract INTRODUCTION Parthenogenesis in Beltsville Small White (B.S.W.) turkeys has been developed over a period of years to a degree at which many fully developed embryos are routinely encountered each season. Parthenogenetic embryos almost invariably show a pronounced time-lag in the onset of their development, usually requiring on the average, two days longer incubation than do embryos from fertilized eggs (Olsen, 1965). Availability of parthenogenetic embryos makes it most desirable, whenever possible, to obtain comparative physiological data. PROCEDURE Twenty one parthenogenetic and 21 normal turkey embryos were used in this study. All parthenogenetic embryos had reached a stage of development at which the beak normally would have been expected to penetrate the air cell, but none had hatched. B.S.W. embryos from the same parthenogenetic strain, but obtained from fertile eggs, served as control. The live normal embryos were removed from the incubator 48 hours before the expected time of hatching in…