ANDROGENESIS, A DIFFERENTIATOR OF CYTOPLASMIC INJURY INDUCED BY X-RAYS IN HABROBRACON EGGS
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چکیده
منابع مشابه
Induced Mutations in Habrobracon Eggs
S long ago as 1921 HOLTHUSEN observed an effect of anoxia on X-rayed A cells. Interest in this factor and its relation to radiation damage has recently been revived. BACQ (1951) has reviewed the earlier work and latest developments have been described by HOLLAENDER, BAKER and ANDERSON (1951), HOLLAENDER (1952) and GILES (1952). One group of investigators has been concerned with the question as ...
متن کاملGenetic Effects of X-Rays and Cathode Rays on Oocytes of Habrobracon.
IFFERENCES in sensitivity of oocytes to X-irradiation depending upon stage in meiosis when treatment occurred, have been shown for a number of organisms including Habrobracon (WHITING l938,1941,1945a, 1945b; ATWOOD, VON BORSTEL and WHITING 1956). Studies have also shown that death of Habrobracon embryos following irradiation of oocytes in late metaphase and in late prophase (diplotene) was attr...
متن کاملX-ray induced visible mutations in Habrobracon oocytes.
HE technique for classifying oocytes of irradiated females of the parasitic Twasp, Habrobracon, into those exposed in first meiotic prophase (prophase I ) and those exposed in first meiotic metaphase (metaphase I) was described by the author in 1945 (1945a). Methods for greater accuracy in estimating lethal rates were described by ATWOOD, VON BORSTEL and WHITING 1956. The striking difference in...
متن کاملAN INDEPENDENCE OF INTENSITY FOR EMBRYO DOMINANT METAPHASE EGGS OF HABROBRACONl LETHALS INDUCED BY X-RAYS IN FIRST MEIOTIC
W H E N Habrobracon eggs are irradiated and subsequently fertilized, the decrease in hatchability is attributed to dominant lethal mutations. Cytoplasmic injury is not lethal at low doses of irradiation (WHITING 1955). If eggs are irradiated in first meiotic metaphase and allowed to develop parthenogenetically, they show a linear decrease in hatchability to an increase in dose (WHITING 1945a; H...
متن کاملInduction of Dominant Lethal Effects by X-Radiation in Habrobracon.
ULLER in 1927 stated that the “partial sterility” of X-rayed males M of Drosophila wasdue,at least to an appreciable extent, to dominant lethal changes induced in the sperm. It was impossible, however, to determine whether the eggs were actually “fertilized.” In Drosophila the result would be the same; the eggs would fail to develop, whether dominant lethals were induced or the sperm were inact...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1949
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1538299