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In fruit flies, the recessive v allele results in vermilion (bright red) eyes; the wild type v+ allele results in red eyes. The dominant p+ allele of a second gene is required to produce pigment; the recessive p allele results in white eyes. When a pure-breeding vermilion-eyed female was crossed with a pure-breeding white-eyed male, the F1 progeny consisted of red-eyed females and vermilion-eyed males. When the F1 flies were intercrossed the F2 progeny of both sexes consisted of 3/8 red, 3/8 vermilion and 2/8 white-eyed flies. Explain these results and show the genotypes of the parents, the F1 and the F2.
In a series of two-point map crosses involving five genes located on chromosome second in Drosophila, the following recombinant frequencies were observed:
Can viruses evolve? Why or why not? a. No, only their hosts can evolve. b. Yes, their genetic make-up responds to natural selection. c. No, they are not alive. d. Yes, they are able to alter their genetic code directly in response to selection pre..
DNA represents the architectural blueprint for all living systems, encoding specific instructions in sequence of its four nitrogen having base pairs that are necessary for building organism.
Determine which types of cells can we derive continuous cell lines? From which types of cells can we? Derive finite cell lines? From which types of cells do we derive mature differentiated cells?
Assume you use phase contrast microscopy to observe a wet mount of a soil sample and a goo sample. In what ways are potential ET microbes similar to microbes previously characterized on earth?
Suppose that each excitatory presynaptic neuron causes a 0.5mv depolarization of postsynaptic neuron, and each inhibitory presynaptic neuron causes a 0.5mv hyperpolarization of postsynaptic neuron.
Create the action potential of a skeletal muscle cell and the action potential of a ventricular myocyte. Be sure to label the phases and the ions that are mediating the change in electrical potential.
Discuss the effect of discharging primary-treated sewage on the biochemical oxygen demand (BOD) and dissolved O2 of the receiving body of water?
If the centrioles are mispositioned in the cell, the functional mitotic spindle would fail to form. In this state, how will chromosome segregation be affected . Microtubules will not attach to kinetochores.
Recognizes true statements of cholesterol and its fluidity. Cholesterol increases membrane fluidity that otherwise contains mainly long chain saturated fatty acids.
Genistein and staurosporin are potent kinase inhibitors. Are genistein ans staurosporin more likely to have an effect in the signal cascade of G-prrotein related or enzyme linked (RTK) receptors.
Those cars are fueled and built with oil from Nigeria, Iraq, Louisiana and Alaska, places laid to misuse by unfettered oil extraction. Imagine you have done a gram stain and determined what antibiotic to use to kill the bacterium, if you expose th..
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