In this chapter, you will learn how natural selection, genetic drift, and gene flow can change the gene pool of a population, thus causing evolutionary change.
Before beginning this chapter, you should be able to use a Punnett square to determine the outcome of a genetic cross (see Figure 14.5). The following question
provides a quick check of your basic knowledge in this area.
Part A
Suppose a BB female mouse mates with a Bb male mouse. Which of the following represents the probabilities of each genotype occurring among their
offspring?
1/4 BB, 1/2 Bb, 1/4 bb
1/2 Bb, 1/2 bb
1/4 BB, 1/4 Bb, 1/2 bb
1/2 BB, 1/2 Bb
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