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A strain of rhesus monkeys is brachyphalangic (that is, it hasvery short fingers). A monkey breeder wanted to create atrue-breeding strain of brachyphalangic monkeys. To do this, hecrossed brachyphalangic monkeys with one another for severalgenerations. Frustratingly, his crosses always produced mixtures ofbrachyphalangic and normal-finger offspring. Combining the resultsof all the matings, he observed a total of 162 brachyphalangicoffspring and 79 normal-finger offspring. Assuming that fingerlength is determined by a single gene with two alleles, how can youexplain these results? In your answer, use correct notation of yourown choice to indicate the genotypes of the brachyphalangic parentsand their brachyphalangic and normal-finger offspring. Also givethe expected phenotype for heterozygotes and both kinds of homozygote.
A patient has esophageal cancer and should have a feeding tube inserted. The nurse tells the patient that the tube will be inserted surgically into the duodenum. The wife asks why the tube will not be inserted into the stomach directly.
125 progeny were produced from the following cross: aaBbCcDd x AaBbccDD. Assume that all the genes are unlinked, and that the uppercase letters represent dominant alleles.
An aquatic arthropod known as a Cyclops has antennae that are either smooth or barbed. The allele for barbs is dominant. In the similar organism, resistance to pesticides is a recessive trait.
What are the three central elements of chemiosmotic theory for coupling oxidation to phosphorylation in mitochondria?
a patient with hepatitis B has reduced liver function. How will reduced function of her liver affect levels of hormones in her blood or urine?
Approximately what percentage of the energy of glucose is transferred to storage in ATP as the result of the complete oxidation of glucose to CO and water in cellular respiration.
What is the difference between an obligate anaerobe, obligate aerobe, chemoheterotroph, diazotroph, aerotolerant anaerobe, and facultative anaerobe?
An observation was made at the Black River High School that in a garden with oleanders, sage, crown of thorns and spider lilies, only the leaves of the spider lilies were eaten by army worms.
A geneticist is studying three loci, each with one dominant and one recessive allele, in a small population of rare plants. She estimates the frequencies of the alleles at each of these loci as A = 0.55 , a = 0.45; B = 0.25, b = 0.75; C = 0.80, c ..
Assume you are attempting to determine if the new DNA sample you have just received contains linear or circular molecules. Digestion using either RsaI or SauI alone produces two fragments.
How do fossils help scientists piece together the "family tree" of a given plant or animal? How do fossils provide evidence for the theory of continental drift?
Describe what a prokaryote is and include a) a description of the genetic material and location, b) what type of organelles they have (if any), and c) if they have a cell wall, cell membrane, or both
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