RELATION BETWEEN X-RAY SENSITIVITY AND CELL STAGES IN MALES OF DROSOPHILA MELANOGASTER

Journal Article · Sat Oct 29 04:00:00 EDT 1960 · Nature

DOI:https://doi.org/10.1038/188429a0· OSTI ID:4132656

Savhagen, R

An investigation was conducted to find the time of appearance of sperm irradiated in meiosis by a direct method and to correlate this with the sensitivity pattern. Mavor showed that irradiation of females caused primary nondisjunction. The appearance of individuals in which ihe paternal sex rhromosomes both have entered the sperm cell indicates that the cell was treated before anaphase l. The occurrence of XO males was used as an indication of genetic damage. The induction of nondisjunction between the X and Y chromosomes in the males served as a criterion of early meiosis (prior to anaphase I). These experiments show that the treated meiotic cells become available for insemination during the seventh day after irradiation and thereafter. From this it may be concluded that the peak of sensitivity presumably corresponds to cells treated during metaphase I or before anaphase I is completed This conclusion is supported by sensitivity studies performed on various materials. (B.O.G.)

• Research Organization: Univ. of Stockholm
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-002485
• OSTI ID: 4132656
• Journal Information: Nature, Journal Name: Nature Vol. Vol: 188
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANIMAL CELLS
BIOLOGY AND MEDICINE
CHROMOSOMES
GENETICS
GONADS
INSECTS
RADIOSENSITIVITY
X RADIATION