Abstract

Radiation-induced stable chromosome aberrations have been studied in the testes and bone-marrow of the mouse ( Mus musculus). 60 days after whole-body irradiation with a dose of 400 rad X-rays, the frequency of visible chromosome aberrations in bone-marrow cells was 19.8%. The frequency of chromosome aberrations in spermatogonia of the same mice, scored as multivalents in spermatocytes, was considerably lower — only 4.7%. The possible mechanisms underlying this marked difference in translocation yield are discussed.

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