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Embryonic pattern specification during development in some cases requires maternally contributed ‘determinants', and in others is regulated by signaling between cells. For each of the following developmental events, indicate whether it is primarily maternally contributed determinants or instead local interactions between cells that is most important. In addition, name one important gene involved in each process.
(a) Germ cell specification in Drosophila
(b) Neural Crest Cell specification in vertebrates
(c) Anterior/Posterior border specification in Drosophila wing imaginal disk
Explain the directed mutation hypothesis (1). Describe an experiment that has tested this hypothesis (2). What was the outcome of this experiment (1)? What did this experiment teach us about how mutation and natural selection interact during evolu..
Suppose archaeologists discover human skeletal remains in Ethiopia. Examination of the bones suggests that the remains represent four types of individuals. Two of the skeletons have bone densities that are 30 percent less than those of the other two ..
You have been given several bacterial strains from various countries around the world. It is thought that all the strains cause the same gastrointestinal illness and are genetically identical.
Between 300-400 words describing the pathogen and the disease it causes. Be sure to include what type of pathogen it is, how the pathogen is transmitted, how it enters the body?
Compare and contrast the processes of replication and transcription. Be sure o include in the discussion a comparison of the purpose of the processes, the templates used in each process, when each process occurs, and the initiation and termination..
Could someone please help me with this homework problem? I'mthinking that the white eye gene and the red eye gene operates byepistasis.
The measurements to be comparable in both preparations. Illustrate one experiment you could perform to demonstrate such lack of equivalence of the two cells in the zygote. Noticeably state the expected outcome of your experiment in the reply you prov..
Suppose you want to separate leaves, acorns, and wigs from apile of soil. Filtration and Distillation are the only two process of separating. Explain which one you would chose and why?
Discuss the Latin and common name for five plant species native to Virginia. Latin and common name for two species whose flowers attract butterflies.
Why cant microbes that naturally clean up the environment continue to do so as in the past? How have humans made their task harder? Easier?
Each ATP molecule undergoes about 10,000 cycles on synthesis and hydrolysis every day. How much ATP in our body according to these observations?
in many developing countries diseases from inadequate water supply and water contamination are a major cause of
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