Related Experiment Video
Updated: Aug 11, 2026
12:49
Purification of Transcripts and Metabolites from Drosophila Heads
Published on: March 15, 2013
[Genetic effects in Drosophila caused by space flight factors in "Kosmos-573"]
Genetika
|January 1, 1975
Abstract:
It was proved in the experiments conducted on the space-ship "Cosmos 573" that the factors of the cosmic flight raised significantly the mutability in the D-32 wild type line of Drosophila melanogaster for two kinds of mutations: sex-linked recessive lethals and visible mutations in two X-chromosome's locuses: white and yellow.
Related Concept Videos
02:32Position-effect Variegation
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
02:27Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...