Sapna Is Interested in the Influence of Nutrition on Reaction

question 30

Multiple Choice

Sapna is interested in the influence of nutrition on reaction time. She assigns participants to eat a salad and fruit for dinner every day for a week or to eat fast food each day. She then brings participants into the lab and asks them to push a button on a keyboard as fast as they can every time they hear a particular sound. What are the operational definitions of the variables in Sapna's study?

• A) nutrition; reaction time
• B) nutrition; whether participants eat a salad or fast food
• C) whether participants eat salad or fast food; how quickly they push the button when they hear the sound
• D) whether participants eat salad or fast food; reaction time

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Definitions:

Pleiotropic Gene

A single gene that influences multiple phenotypic traits, demonstrating the complexity of gene expression on phenotype.

Multiple Effects

The outcome or consequences that arise from a single cause, which can impact different systems or functions within an organism or environment.

Epistatic Gene

A gene that can interfere with the expression of other genes, altering the phenotypic outcome and creating variations in traits.

Dominant

Referring to an allele or a gene that expresses its phenotype even in the presence of a recessive allele of the same gene.