It has been found that a particular "+ –" combination of frameshift mutations in gene X gives a wild-type phenotype, whereas a "– +" combination gives a mutant phenotype, even though the sites of insertion/deletion are the same
How might these results be explained?
A frameshift in the "+ –" direction may have introduced a nonsense triplet, which was not introduced, by chance, by the opposite "– +" combination.
You might also like to view...
DNA sequencing can reveal
A) mutations that do not alter phenotype. B) mutations that do not alter genotype. C) which tissues express a gene. D) how many genes a person has.
Both plants and animals possess mitochondria, which are used for cellular respiration to make ATP
Indicate whether the statement is true or false.
The figure shown above is of what kind of
tissue? a. blood b. adipose c. bone d. cartilage e. dense connective
Which type of test is particularly useful in analyzing tumors in tissues surrounded by bone?
A. PSA B. CAT scan C. Pap test D. MRI E. X-ray