SPONTANEOUS CHROMOSOME ABERRATIONS IN DROSOPHILA ROBUSTA

Chromosome interactions in Drosophila robusta.

M O S T of the population genetics work on Drosophila species has been done with polymorphism at a single gene locus or different gene arrangements in one chromosome which behave in inheritance as single genetic units. However, little attention has been given to the problem of interactions between unlinked polymorphic loci. Consider two unlinked autosomal loci A and B and their variant alleles ...

Spontaneous Chromosome Aberrations in Allium.

ROSS chromosome aberrations or rearrangements have recently G come to occupy an important position in the study of problems of evolution and speciation. Such aberrations are known to occur in many plants and animals. However, the spontaneous occurrence of these aberrations is rather difficult to study, since their frequency is usually very low. In an endeavor to obtain a further understanding o...

Spontaneous Chromosome Aberrations in Triploid Tradescantia Hybrids.

T HAS recently been found that chromosome aberrations of the types I induced by various kinds of radiations occur spontaneously during the development of the pollen grains in diploid species and especially in species hybrids of Tradescantia (GILES 1940). The present studies have shown that the frequency of these aberrations is even higher in triploid Tradescantia hybrids. Furthermore, it has be...

Chromosome aberrations in astronauts

A review of currently available data on in vivo induced chromosome damage in the blood lymphocytes of astronauts proves that, after protracted exposure of a few months or more to space radiation, cytogenetic biodosimetry analyses of blood collected within a week or two of return from space provides a reliable estimate of equivalent radiation dose and risk. Recent studies indicate that biodosime...

Food preference in Drosophila robusta and Drosophila tripunctata following desiccation