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In some genetically engineered corn plants the dominant gene (D) produces a protein that is lethal to certain insect pests that eat the corn plants. It was found that the pollen could also kill the insect pests. If a corn plant is heterozygous for D, what proportion of the pollen would carry the lethal gene? Please explain
Butterflies are typical diploid eukaryotes with the following inherited situations, True-breeding c s o are crossed to c+ s+ o+ to produce F1 progeny
Organize the genotype in the table, define the origin (parental, single cross-over progeny and double-crossover progeny) and find out the order of the genes on the chromosome.
What was the mutational event that gave rise to the frameshift mutant? Determine precisely where the single nucleotide insertion or deletion occurred in the b-lactamase coding sequences.
Low levels of carnitine can cause muscular weakness during exercise. Why, and will it affect metabolism of glycogen?
What type of tissue would you choose if you wanted to produce clones? That is, if you wanted to produce a plant from a single cell? explain.
Determine how much in mL of .5 M NaOH total can you add to the solution in question 4 and still have a good buffer also Extimate the pH of a 0.05 M solution of TRIS acid (pKa=8.3)?
A drug that does not dissociate has a molecular weight of 300. If 300 g of this drug are dissolved in 1000 ml of water, determine the osmolarity of resulting solution?
The internal structure of the cells of many protists is much more complex than cells of multicellular organisms. Does this mean that protists is engaged in more complex activities than muticellular organisms?
A typical bacterial flagellum is about 20 nm wide. About how many times must the diameter of the flagellum be increased to make visible using a bright field microscope?
Create a diagram of the explanation in the paragraph. I recommend that you attempt each problem on your own, then meet with your classmates to discuss possible answers.
In a generalized transduction experiment, phages are collected from an E. coli donor strain of genotype cys+ leu+ thr+ and used to transduce a recipient of genotype cys- leu- thr-.
How does digestion progress once a carbohydrate reaches the small intestine, and what substances must be released from the pancreas to allow digestion to continue?
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