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Suppose that in Drosophila melanogaster an XXY female with white eyes (due to the w^1 allele on both copies of an attached X chromosome) is mated with a male that has a yellow body (due to the y allele on the X chromosome). Which of the following best describes the phenotypes and their proportions in the first-generation progeny?
a. All males will have white eyes and all females will have yellow bodies.
b. All males will have yellow bodies and all females will have white eyes.
c. All males will have white eyes and all females will be wild type.
d. All males will have yellow bodies and all females will be wild type.
e. All males and females will be wild type, although both yellow-bodied and white-eyed flies will appear in the F2 generation.
A drug has a molec. weight of 200. Determine how many grams would you use to make 100 ml of a solution that is isotonic? Suppose that the diluent is distilled water and that the drug does not ionize in water.
Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water.
In the F2 of his cross of red flowered x white flowered Pisum, Mendel obtained 705 plants with red flowers and 224 with white.
Compare and contrast the benefits and consequences of salt and sugar as a preservative. How could a food manufacture that produce food intended for a low salt diet ensure a long shelf life?
For the E. coli lac operon, write the partial diploid genotype (for O,Z and Y) for a bacterial strain with an F prime plasmid that will produce beta-galactosidase constitutively and permease inducibly.
An agglutination test was performed on patient's blood. The titer was 512, and upon further testing the antibody involved was identified as IgM. Why can some major organs/tissues be safely removed from the lymphatic system?
What would be the expected frequencies of the homozygous dominant, heterozygous, and homozygous recessive after 100 generations.
What provides a shortest-term mechanism for preventing acid-base imbalances in the body? The longest-term mechanism? Describe each in specify.
In many countries, conservationists are trying to design national park systems so that "islands" of natural area (the big parks) are connected by thin "corridors" of undisturbed habitat. The idea is that this arrangement will allow animals and plants..
Molecular Weights as determined by SDS-PAGE & NATIVE PAGE GEL How do the two masses compare with one another as determined by the two methods?
what is the mechanism driving the bromothymol blue solution color change? This is a quesiton from my bio lab as how cellular respiration occurs in germinated beans, dry beans, or no beans at all. Anyone know?
Rifamycin and actinomycin D are two antibiotics derived from bacterium Streptomyces. Rifamycin binds to b subunit of E. coli RNA polymerase and interferes with formation of the first phosphodiester bond in the RNA chain.
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