HETEROZYGOTE VIABILITY OF A SECOND CHROMOSOME RECESSIVE LETHAL IN DROSOPHILA MELANOGASTER
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چکیده
منابع مشابه
Single Gene Heterosis Associated with a Second Chromosome Recessive Lethal in Drosophila Melanogaster.
OR the reasons that heterosis has immense value in practical utilization in F agriculture and the evolutionary significance of heterosis in natural populations is important, a number of investigators have worked on this problem and proposed numerous hypotheses for the explanation of this phenomenon. The hypotheses which have been proposed can be classified into two categories: (a) dominance the...
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Received August 26. 1964 A large number of both spontaneous and induced second chromosome recessive lethals in Drosophila melanogaster have been reported. Almost of all these lethals are rather rapidly eliminated from populations under random mating conditions. IVES (1945) and WALLACE (1950) have estimated the number of second chromosome loci of lethal genes as 495 and 400, respectively. Some l...
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The efficiency of the adult feeding method for EMS treatment in Drosophila melanogaster was studied by measuring the frequency of induced recessive lethals on the second chromosome. The treatment was most effective when mature spermatozoa or spermatids were treated and was much less effective on earlier stages. The number of mutations induced was proportional to the concentration except at the ...
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XPERIMENTAL populations of Drosophila melunoguster kept by DR. BRUCE E WALLACE and his collaborators (1951) received chronic radiation of approximately 2,000r per generation. The effect on the fourth chromosome was analyzed by these investigators by outcrossing males from the irradiated populations with females carrying the dominant mutations, “cubitus interruptus” (ci”) and “eyeless” (ey”) as ...
متن کاملChromosome interactions in Drosophila melanogaster. I. Viability studies.
The nature of fitness interactions is an important, yet unsolved, question in population genetics. We compare the egg-to-adult viability of individuals homozygous for either a second or a third chromosome with the viability of individuals homozygous for both chromosomes simultaneously. On the average, the viability of the two-chromosome homozygotes is somewhat greater than expected assuming tha...
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ژورنال
عنوان ژورنال: Genetics
سال: 1960
ISSN: 1943-2631
DOI: 10.1093/genetics/45.3.315