Comparative egg maturation was observed between fertile eggs laid by unirradiated females, by unirradiated females mated with irradiated males, by irradiated females mated with normal males, and by virgin unirradiated females. Haploid eggs turn yellow and dry by the fifth day. Eggs from irradiated parents develop more slowly than normal eggs. Most embryos from parents irradiated as P generation adults at 16.8 kilorads for males and 12.0 kR for females die early in embryonic development. A description of egg development is included.

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