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A Drosophila researcher has recently isolated a number of mutant fruit flies. The phenotype of each mutant is described below (i–iv). For each mutant, describe the type of gene (maternal-effect gene, gap gene, segment-polarity gene, or homeotic gene) that was most likely the cause of the altered phenotype. Briefly explain your answer(i) Homozygous mutant females appear phenotypically normal but produce larvae that have two posterior ends.(ii) The flies contain four wings rather than two.(iii) The wings are oriented backward.(iv) The flies are missing two pairs of legs due to a shortened thoracic region
Explain and describe the presence of biodiversity in the living world as manifest by various differential responses to temperature cues among invertebrates and vertebrates.
Your blot results show that one of the genes had a band by southern blot but no mRNA or protein produced when analyzed by northern and western blot.
On average, cells in the Allium root tip divided about once per day. Assuming this is true for the specimen you examined, use your calculations of relative duration to determine how much time, in minutes, Allium cells spend in each phase of mitosi..
The evolution of organisms is not as simple as the single locus models used to define basic theory. Models that describe two locus evolution, and the correlation among these loci, are more complex.
Summarize the theory that Alzheimer and Parkinson disease are due to prion infection. b) If these disorders are infectious, should these patients be quarantined (kept away from public contact)?
suggest some ecological research topics that is reliable, that could include chi square test in the research OR suggest how to use chi square in this topic "over fishing threatens the survival of seabirds".
Suppose that you are conducting an experiment to determine the optimal best amount of fertilizer on tomato plants. You apply 0, 5, 10, 15, or 20 grams of fertilizer per plant.
1. why does ice float?your response should be at least 75 words in length. you are required to use at least your
calculate the volume and density of a rock that has mass 110g and will cause the water to rise in graduated flask from 450 ml-715 mil, express in cm^3. calculate density of mass 36g and vol 72 ml, will it sink?
What lands and observations inspired Darwin to develop his theory of evolution? How does the concept of natural selection explain variations in species descended from a common ancestor?
You run a set of reactions to determine the reaction rate as a function of substrate concentration and notice that the rate decreases as your substrate concentration increases.
What would be the sequence immediately after reaction with nitrous acid? Use the letter H to stand for hypoxanthine and U to stand for uracil
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