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A new kind of tulip is produced that develops only purple and pink flowers. Assume that flower color is controlled by a single-gene locus and that the purple allele (C) is dominant to the pink allele (c). A random sample of 1000 tulips froma larg cultivated field yields 812 purple flowers and 188 pink flowers.
a. Determine the frequency of the purple and pink alleles in this field population.
b. Estime the proportion of all purple flowering plants that are heterzygotes and homozygotes.
The condition known as Bell's Palsy may result in drooping of the face. Typically, the condition is unilateral but in rare instances can be bilateral.
What would be the effect of the same analogue on signal transduction of an epithelial cell after exposure to epidermal growth factor (EGF)? How would this compare to the effects of the cholera toxin on these same cells.
Illustrate the main types of faults and corresponding directions of stress. Differentiate between fault and joint. How does the stress differ between the two? Of what importance are these fractures to other geological processes.
The MN blood group is determined through a single gene with two alleles M and N. A Navajo population in New Mexico was tested for this blood group.
Suppose that a series of compounds has been found in Neurospora . Compounds A-F appear to be members of an enzyme pathway.
The next litter produced 8 white, mule-footed offspring and one white clove-footed pig. Now, what is the most probable genotype of the sow.
Scientists can use mutants to study metabolic pathways. These organisms have mutation in gene encoding a metabolic pathway enzyme that results in inactivation of that enzyme.
Compare and contrast signaling by neurons which secret neurotransmitters at synapses to signaling carried out by endocrine cells, that secretes hormones into the blood, define the relative advantage of the two mechanisms.
What is the purpose of an uninoculated control tube in a differential test? Should this tube be incubated with the tubes that are inoculated? Why or why not?
Explain the study of hypothesis? Specify the outcome variables and also state how they were measured? Explain the study factors (exposures) and how were they measured?
Assume you are provided an isolated muscle with its motor nerve intact. The preparation allows you to make electrophysiological analysis from the nerve and muscle as well as mechanical measurements of muscle contraction.
Determine which organelle found in plant cells is responsible for converting sunlight energy into the chemical energy found in sugar molecules?
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