STAGES OF DEATH OF X-RAY-INDUCED EMBRYO LETHALS IN HAPLOIDS AND IN HETEROZYGOTES OF HABROBRACON
This study demonstrates that, for x-ray-induced embryo lethals, dominants in haploids, dominants in heterozygotes, and recessives in haploids kill at increasingly later stages, respectively; and haploid embryos with more than one recessive lethal respond differently in respect to mean stages at death depending on whether the lethals were induced by x-irradintion of oocytes or of spermatozoa. ln oocytes x-ray-induced lethality appears to be due to recessive lethals sensu stricto, and there is no correlation between number of lethals present in an embryo and its stage at death, no cumulative effect. In spermatozoa evidence suggests induction of translocations and inversions in addition to true recessive lethals. The significant positive correlation between numbers of lethals and stages at death may be due to these additional factors. (auth)
- Research Organization:
- Univ. of Pennsylvania, Philadelphia
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-12-005846
- OSTI ID:
- 4337712
- Journal Information:
- Radiation Research, Journal Name: Radiation Research Vol. Vol: 8
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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