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In a sample from a grasshopper population, you find four alleles at a particular locus. The frequencies of A1, A2, A3, and A4 are p1= 0.50, p2=0.30, p3=0.15, and p4=0.05. Assuming Hardy-Weinberg equilibrium, calculate the expected proportion of each of the ten possible genotypes (e.g., that of A2A3 should be 0.09). Show that heterozygotes, of all kinds, should constitute 63.9 percent of the population. In a sample of 100 specimens, how many would you expect to be heterozygous for allele A4? How many would you expect to be homozygous A4A4?
A scientist claims that cows eat bacteria not hay. Explain how the idea of biofilms confirms the scientist's statement.
A population of fifty-thousand around a nuclear facility receives an average wholebody dose of 0.5 rad as a result of an accidental release of radionuclides.
what is a plate count and why would it be used instead of direct microscopic counts or turbidity measurements?
Pneumonia is diagnosed by a presence of fluid (dark shadows in an X-ray image) in the alveoli. Given that pneumonia generally is caused by a microorganism, what causes the fluid accumulation? Name a bacterium, a virus, a fungus, a protozoan, and a he..
Monkeys infected with "Devil Pox" survive depending on their genotype at a single locus. AA individuals survive 50% of the time. AB individuals survive 75% of the time.
In a germination experiment the germination rate and timing of wild radish (Raphanus raphanistrum) and crop radish (Raphanus sativus) were measured.
Freediving is an activity in which a person dives, sometimes to great depth, without use of scuba gear. The diver must hold his or her breath for the duration of dive.
Find a transverse section of the human body that was imaged using computerize tomography or magnetic resonance imaging (MRI), and indicate anatomical planes,
A protein has an apparent mass of 800 kD by gel filtration chromatography, but SDS-PAGE shows a single band at a position corresponding to 200 kD. In an ultracentrifuge, will the protein exhibit a sedimentation coefficient corresponding to 200 kD ..
Explain why some drugs used to treat type 1 diabetes are compounds that diffuse into the cell and activate tyrosine kinases. Why might they not be as effective in the treatment of type 2 diabetes?
On your break, you prepare orange juice from frozen concentrate that you purchased at the store. Given the directions, you mix the concentrate with three cans of cold water.
Describing inheritance of traits or genetic disorders genetic disorders.determine the modifications (percentages) for having a healthy child (not a carrier).
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