Animal Behavi18 - behavioral comparisons can isolate...

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Animal Behavior: Instinct Twin Studies Twin studies are extremely important in studying human subjects, because humans cannot be bred for certain traits and are hard to manipulate in an experimental fashion. Monozygotic twins, commonly known as identical twins, are genetically identical. Dizygotic twins, or fraternal twins, are no more genetically similar than non-twin siblings are. Therefore, if monozygotic twins share a behavioral trait significantly more frequently than dizygotic twins do, it can be assumed that behavior has a genetic component. It is important to study the shared traits between monozygotic and dizygotic twins, as well as nontwin siblings, because each set of siblings can yield information in comparison with the others. Monozygotic twins and dizygotic twins differ in the amount of genetic material shared, but should have the same prenatal environment, and so
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Unformatted text preview: behavioral comparisons can isolate genetic components for assessment. Dizygotic twins are no more genetically similar than nontwin siblings, but non-twin siblings do not share their prenatal environment, and so comparison can yield opportunities to asses environmental components. Knockout Studies An important technique in molecular analyses of behavioral genetics is the knockout study. Mice are literally designed to express or fail to express certain traits by inserting or subtracting genes from embryonic cells and then reinserting them into a female to gestate. In most knockout studies, a mechanism is designed so that researchers can turn on and off the gene, usually by treatment with an antibiotic. This is accomplished by combining the inserted or deleted gene with another gene susceptible to antibiotics....
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This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.

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