A geneticist is studying a particular Drosophila mutant that produces a phenotype of "no wing" due to a mutation in a gene called wingless. She takes the mutant wingless and mutagenizes it. She hypothesizes that any fly that emerges with wings will be
due to the original mutated gene reverting back to the wild-type allele. From this study, she identifies a fly that now has wings. When she sequences the wingless gene, she discovers that the original mutation is still there, and there are no other mutations in the wingless gene. However, a second gene at a separate locus is mutated. The second mutation is best classified as a(n) ________.
A) conditional mutation
B) intergenic suppressor mutation
C) haploinsufficiency mutation
D) intragenic suppressor mutation
E) null mutation
Answer: B
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Cellular slime molds can be distinguished from plasmodial slime molds on the basis of ____
a. reproductive structures b. spore formation c. nuclei per cytoplasm d. slime trails e. food requirements
The respiratory quotient is calculated as the
A) sum of the volume of oxygen consumed and the volume of carbon dioxide produced. B) product of the volume of oxygen consumed and the volume of carbon dioxide produced. C) ratio of the volume of oxygen consumed per volume of carbon dioxide produced. D) product of the volume of carbon dioxide consumed and the volume of oxygen produced. E) ratio of the volume of carbon dioxide produced per volume of oxygen consumed.
A layer of permanently frozen ground is called permafrost. Indicate whether the statement is true or false
Noncompetitive inhibitors bind the active site of an enzyme, reducing its activity and the subsequent formation of product.
Answer the following statement true (T) or false (F)