Genetic drift may result in the loss of some alleles

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Genetic drift may result in the loss of some alleles (including beneficial ones) and the fixation, or rise to 100\%100%100, percent frequency, of other alleles.Genetic drift can have major effects when a population issharply reduced in size by a natural disaster (bottleneck effect) or when a small group splits off from the main population to found a colony (founder effect).Using a field guide to identify a species based on appearance is an example of applying the morphospecies concepts
Take Test: Practice Exam 3 Test InformationDescriptionInstructionsMultiple AttemptsNot allowed. This test can only be taken once.Force CompletionThis test can be saved and resumed later.Question Completion Status:QUESTION 11.Scaredy‒snakesA researcher studied the relationship between the phenotypes of snakes and their fitness. First, he measured the color patterns and escape behavior of hundreds of snakes. For color
pattern, snakes were scored as being either checkered or striped (see photos below). For escape behavior, snakes were chased by simulating a predator attack; some snakes moved in a straight line while fleeing, but others tended to turn frequently. After recording these phenotypes, the researcher released the snakes in their natural environment. A year later, he returned to see which snakes had survived. The survival of snakes was used as a proxy offitness. The figure below shows the relationships between color pattern and relative fitness for snakes that flee straight and snakes that flee by turning.Figure 1.Both the color pattern and escape behavior of a garter snake affects its fitness relative to other snakes. Photos of a checkered snake (top) and a stripe snake (bottom) are shown.Use this information to answer questions 1-6.True/False:Regardless of its color pattern, a snake that flees a predator by turning would likely survive.
1.25 points QUESTION 21.A snake with stripes would be more likely to survive by fleeing predators in a straight line.
1.25 points QUESTION 31.Regardless of escape behavior, the color pattern of snakes will be influenced by directional selection.
1.25 points QUESTION 41.Over many generations, the population of snakes should evolve toward striped snakes that flee by turning or checkered snakes that flee straight.
1.25 points

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