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A student analyzed ears of corn that demonstrated two traits in the F2 kernels, purple or white colors and smooth or wrinkled shapes. A tabulation of 135 individual kernels gave the following results:
purple and smooth = 75white and smooth = 28purple and wrinkled = 24white and wrinkled = 8
How many phenotypes are present?
Which are the three stages for identification of coliforms in a water sample? Can you confirm the presence of coliforms at each stage? Why or why not?
List the four "large molecules of life". Identify their composition and structure, and describe one function they perform in the cell. As well as their breakdown products.
Is a viable count really reflective of the number of bacteria in environment you sampled? For example, if grow bacteria in different dilution factors on a agar plate.
A sea urchin egg is used in a voltage clamp experiment; that is, the value of the transmembrane voltage is set by the experimenter, not by the properties of the membrane.
Draw a 4x4 Punnett Square for the F2 generation (using the F2 gametes) and determine the expected ratio of phenotypes
DNA sequences differ between species due to substitution events, i.e. when new mutations arise and become fixed by drift or selection in one of the species.
Develop the process of transcription using dsDNA as a template to produce a final functional mRNA. In your drawing label the direction of the nucleic acids, RNA polymerase,
Consider that, in the hypothetical study given in the table below, cases underestimated their exposure and, as a result, 20% of exposed cases were falsely classified as unexposed.
Suppose that an organism exists in which crossing over does not occur, but that all other processes associated with meiosis occur normally.
What are prions? Select one: a. misfolded versions of normal brain protein b. tiny molecules of RNA that infect plants c. viral DNA that has had to attach itself to the host genome d. viruses that invade bacteria e. a mobile segment of DNA
Discuss how the barrier function of membranes is utilized in the production of ATP in the electron transport system of mitochondria.
Briefly, discuss the difference of movement of objects in your visual field that are near compared to those that are far away. Think moon vs. light pole.
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