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Two different mutations are identified in a haploid strain of yeast. The first prevents the synthesis of adenine by a nonsense mutation of the ade-1 gene. In this mutation, a base-pair substitution changes a tryptophan codon (UGG) to a stop codon (UGA). The second affects one of several duplicate tRNA genes. This base-pair substitution mutation changes the anticodon sequence of a tRNATrp from 3'-ACC - 5' to 3'-ACU - 5'
1. Do you consider the second mutation to be a forward mutation or a reversion?
Do you consider the second mutation to be a forward mutation or a reversion?second-site reversion (suppressor)forward mutationtrue reversionintragenic reversion
2. Assuming there are no other mutations in the genome, will this double-mutant yeast strain be able to grow on minimal medium? ( yes or no)
Since a doughnut contains a large quantity of energy that can become available for our metabolism when eaten, why isn't the doughnut "jumping" all over the counter or hot to the touch.
Cleavage of DNA with restriction enzymes provides landmarks and sequence information. How frequently are specific sites found? How many sites are expected? Does this change if the DNA is circular.
In the F2 generation, you find that you have 235 flies displaying the wild type phenotype and 765 flies displaying XYZ phenotype. Which phenotype, Wild type or XYZ, is dominant.
Yesterday, when Eric returned home from jogging, he was breathing heavily, sweating profusely, and complained that his legs ached and felt weak. He took a drink of Gatorade and took it easy until he could catch his breath.
State the key products of the Kreb's Cycle and how various of each there are starting from 1 glucose molecule.
List and explain at least three cellular features of bacteria that might be targeted to inhibit or kill a bacterial pathogen.
why DNA was discarded as a possible candiate
Explaining the cellular respiration and therocess of photosynthesis of plants.
What is the possibility that the son would have both the Xg antigen and ichthyosis. Why is the man a major candidate for a heart attack.
Anatomical attributes that are reduced and functionless in organisms but related to functional organs in related organisms are termed. Vestigial. Homologous.
You now grow Daphnia and Bosmina together. Suppose they remain limited by phytoplankton. What genetic basis of erminette pattern is suggested? How would you test your hypothesis.
Suppose the gene for dimples, d, is recessive. Then suppose that two individuals with the genotypes Dd and dd mate.
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