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You start with a population of cattle in which the heritability of body weight is 0.7. You begin a program of artificial directional selection to increase body weight. You continue this generation after generation. What will happen to the frequencies of alleles of different genes that cause an increase in body weight, and the frequencies of those allels that cause a decrease in body weight? What do you think will happen to the heritability of body weight after 20 generations of selection? Will it increasem decrease or stay the same? Explain your reasoning.
Which halogen is used in gaseous and liquid form for large scale disinfection of drinking water and sewage.
A microbiologist must culture a patient 's feces for in testinal (enteric) pathogens. Which of the following meida would he likely use. What is the purpose of resazurin in reducing media.
Explain what it means to say that the genetic code is redundant. How does this redundancy help protect against mutations?
The cleavage of a peptide bond by chymotrypsin is caused by a nucleophilic attack by an active-site residue. Which of the following is true?
In most organisms, oxygen slows down glycolysis, and pyruvate is directed towards the TCA cycle rather than fermentative pathways this is called the Pasteur Effect.
Which cytoskeletal proteins are important constituents of the contractile structures that form the cleavage furrows involved in animal cell cytokinesis?
Few decades ago, most population geneticists believed that populations are genetically uniform, except for rare deleterious mutations.
In a protein sequence, which repeated sequence over a twenty amino acid stretch would most likely lead to insertion of a transmembrane domain into a lipid bilayer.
Draw the synaptic configuration of homologous pairs of chromosomes when one member is normal and the other member has sustained a duplication within the chromosome
Recessive mutant alleles of an x-linked gene in Drosophila, crossveinless, prevent the development of supporting structures in the wings.
How are carbohydrates important in RNA and DNA. What is their function in body organs and nerve cells? Do you know of any other functions?
The science of ecology has roots in many disciplines. Describe how nineteenth century naturalist influenced the development of ecology.
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