You Conduct an Experiment in Which You Raise Six Replicated

question 37

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You conduct an experiment in which you raise six replicated lines of fruit flies for eight generations. You keep population size constant at 20 adults per generation. You are interested in a gene, bw, that affects eye color. This gene has two alleles, bw-1 and bw-2. You start each replicated line with the frequency of the bw-1 allele at 50 percent. Do the data in the graph better match the prediction for the bw alleles evolving by genetic drift or by directional selection? Be sure to define directional selection and genetic drift and describe the prediction of both hypotheses.

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Definitions:

Costovertebral Angle

An anatomical term referring to the area on the back formed by the lower border of the 12th rib and the vertebral column.

Percuss

To tap or strike the body lightly, especially in a medical examination to determine the condition of the underlying tissue or organ by the sound produced.

Pyridium

A medication commonly used to ease the pain, irritation, or urgency caused by urinary tract infections by numbing the bladder and urethra.

Urinary Incontinence

The loss of bladder control leading to the unintended release of urine.