X-RADIATION OF EGGS OF RANA PIPIENS AT VARIOUS MATURATION STAGES

Publisher Website
Google Scholar
Abstract
Eggs of R. pipiens in germinal vesicle stage (ovarian eggs), meta-phase of the 2d maturation division (uterine eggs) and eggs completing the 2d maturation division (20 min. after fertilization) were X-rayed with doses ranging from 100 to 41,600 r. Counts were made of cleaved eggs, gastrulae, neurulae, hatched embryos and normal tadpoles. Cleavage rate and pattern were unaffected. There appear to be 2 major effects of the X-radiation: an immediate effect which inhibits cleavage and another which becomes apparent at the time of hatching with the production of a high % of abnormal tadpoles. The uterine eggs were more sensitive to the X- radiation than were the ovarian eggs, and the fertilized eggs were by far the most sensitive of the 3 groups treated. The types of abnormalities produced were similar to those resulting from X-radiation of the sperm of the same species (Rugh).

This publication has 12 references indexed in Scilit: