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A population of 100 crickets contains 65 individuals that can produce long, extended noises. The ability to produce such sounds is governed by a single gene with only two alleles; one is completely dominant to the other. Thirty of these 65 crickets are heterozygous. Use this information to answer the […]

1. You are in a lab that is studying the process of DNA replication. You are particularly interested to know what exactly happens at the replication fork. To answer this question, you have set up a series of DNA replication reactions in test tubes using physiological buffers and conditions. However, […]

1.”Four out of five doctors prefer Fred’s Aspirin.” This is an example of a type of nonprobability sample called a judgment sample. In a judgment sample, you get the opinions of preselected experts in the subject matter. Unfortunately, no matter how well informed the experts are, like with all nonprobability […]

Bacterium Vibrio cholerae causes the disease cholera. Infected people have such severe diarrhea, they may lose as much as 20 liters of fluid a day. The bacterium enters the body when a person drinks contaminated water, then adheres to the intestinal lining. During its metabolic activities, it secretes a substance […]