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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
For plants, adaptations to a land environment are different from adaptations to a fresh water environment. Using your knowledge about anatomy, development, and physiology of angiosperms, discuss the problems in a land existence and adaptations of ..
In light of the 1918 Spanish Flu pandemic and the more recent 2009 H1N1 influenza pandemic, what are some of the epidemiological patterns that were noted in 1918 that must be taken to avoid another major pandemics in the global society?
If you pour 50 blue beads into a 250 ml beaker and you randomly take 50 beads from the beaker and place them in a 100 ml beaker (#1). Then you pour 50 green beads and 50 yellow beads into a second 250 ml beaker
Compare the divisions of the autonomic nervous system's effect on heart rate and stroke volume.how to Describe an action potential.
what are the two tiny structures located in the cytoplasm near the nuclear envelope at the beginning of prophase?
what are the risks and benefits of transgenic organisms in agriculture and in medicine?imagine that you are a biologist
Describe two important factors that contribute to the buildup of CO2 in the atmosphere and contribute to global warming. Discuss possible ways to control these factors.
For the design include the independent variable, the dependent variable, two possible controls, and 2 units of measurement the researcher should use and what the unit should be used to measure.
Explain how each of these ideas works and find ways to link between them. Present examples from your experience to demonstrate an understanding of the principles involved.
q1. sometimes cdnas turn out to be monsters that is fusion of dna copies of two different mrnas accidentally inserted
Pathogenic organisms have evolved a number of mechanisms to evade or inactivate parts of the immune system. For each category of micro-organism (viruses, bacteria, parasites), describe two mechanisms that are unique to that category of micro-organ..
what is the color of benedicts solution after it is boiled for 5 minutes with a cracker that you chew and one that is crumbled in tap water?
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