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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
In light of what you now know about cellular respiration, explain the mechanism of action of poisons such as carbon monoxide, arsenic and 2,4 dinitriphenol (DNP), in that order.
A triploid cell containes sets of three homologous chromosome is a cell of used chromosome per cell is triploid this cell would be expected to have which of the.
Predict equilibrium potentials E K and E Na at a temperature of 13 o C. Suppose that the Na permeability of the cell membrane is 1/50 that of the K permeability, predict the resting potential, E m , assuming that Cl is in equilibrium.
A heterozygous round seeded plant is back crossed with a homozygous round seed plant. what are the proportions of the genotype and the proportions of the phenotype?
Describe how the evolution of roots and simple vascular transport expanded the habitat of plants onto land.
Explain how this exchange of materials helps support homeostasis within the cell, and allows for life functions within the cell.
Which of the following is not a major function of the plasma proteins in the blood? 1. membrane permeability 2. clotting 3. osmotic balance 4. pH buffering 5. chloride ion levels
What important information did Darwin receive back in England from ornithologist John Gould that helped him arrive at his key insight?
q1. what would most possible be used for moving a medium-sized molecule from a low concentration on the outside of a
Discuss similarities and differences of artificial selection and genetic engineering of organisms. In your answer also include one advantage and one disadvantage for each technique, as well as one example of each.
According to the Acceptable Macronutrient Distribution Range (AMDR), what is the lowest percent of one's total kcalories that should come from carbohydrates?
Two phenotypes are found for the cuteness trait, cute (C) which is dominant to extreme cute (c). You have a cute Stevious whose mother was extreme cute. Determine the number of copies of the cute allele present in each stage of meiosis.
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