Temperature-Sensitive Mutations in DROSOPHILA MELANOGASTER Xii. the Genetic and Developmental Effects of Dominant Lethals on Chromosome 3

AUTOR(ES)

Holden, Jeanette J.

RESUMO

Out of 25,000 EMS-treated third chromosomes examined, ten dominant temperature-sensitive (DTS) lethal mutations which are lethal when heterozygous at 29°C but survive at 22°C were recovered. Seven of the eight mutations mapped were tested for complementation; these mutants probably define eight loci. Only DTS-2 survived in homozygous condition at 22°C; homozygous DTS-2 females expressed a maternal effect on embryonic viability. Two of the mutant-bearing chromosomes, DTS-1 and DTS-6, exhibited dominant phenotypes similar to those associated with Minutes. Each of the seven mutants examined exhibited a characteristic phenotype with respect to the time of death at 29°C and the temperature-sensitive period during development. Only DTS-4 exhibited dominant lethality in triploid females.

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