In the 1920s Muller discovered that X-rays caused mutation in Drosophila. In a related series of experiments in the 1940s, Charlotte Auerbach discovered that chemicals–she used nitrogen mustards–have a similar effect. A new chemical food additive is developed by a cereal manufacturer. Why do we test for its ability to induce mutation?
A) We worry that it might cause mutation in cereal grain plants.
B) We want to make sure that it does not emit radiation.
C) We want to be sure that it increases the rate of mutation sufficiently.
D) We want to prevent any increase in mutation frequency.
E) We worry about its ability to cause infection.
Two models for dominance of a mutation
Recessive epistasis due to the yellow coat mutation
Early geologists discovered evidence of past glaciations in U-shaped valleys
Vaginal Discharge with Microorganisms Caused by Trichomoniasis
Normal compound eye of adult Drosophila
Multiple origins of replication on a single chromosome from Drosophila melanogaster