The 9:3:3:1 ratio is typical of a dihybrid cross in which complete dominance and independent assortment occur. What is the dihybrid ratio with independent assortment of polygenes?
What will be an ideal response?
1:4:6:4:1
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You eat a bowl of beans as part of your dinner. As you digest the beans, the proteins that are present get broken down to their component amino acids. As your body destroys the macromolecules that were present in the beans, is the energy present in those molecules destroyed?
A. Yes. By breaking down these macromolecules, some of the energy they contained is destroyed. B. No. While the vast majority of the energy contained in these macromolecules is converted to heat, it is not actually destroyed. C. No. The energy contained within these macromolecules is converted into other forms of chemical energy and kinetic energy, though some is lost as heat. D. No. Breaking down molecules does not lead to the release of energy.
Which of the cell adhesion molecules is critical to transducing changes in the ECM to a change in the cell?
A. connexins B. cadherins C. integrins D. fibronectins E. claudins
When Ron Evans generated transgenic mice in which the gene PPAR-delta was constitutively active (i.e., always expressed), he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. One consequence of this anatomical change would be that the transgenic mice
A. were more likely to become obese than wild-type (nontransgenic) mice. B. showed less endurance in a running test. C. showed greater endurance in a running test. D. had leg muscles with lower mitochondrial and capillary densities than wild-type (nontransgenic) mice. E. had muscles that were not as red as those of wild-type (nontransgenic) mice.
In performing a Ziehl-Neelsen's staining techniques, the decolorization reagent is
A. A mixture of acetone and ether B. A mixture of different alcohols C. A mixture of acetone and alcohol D. A mixture of acid and alcohol E. none of the above