Question: Rock pocket mice live in the desert of New Mexico and can be either tan or black. Tan mice tend t…

Rock pocket mice live in the desert of New Mexico and can be
either tan or black. Tan mice tend to be more common in areas where
the desert floor is covered with sand and gravel. Black mice are
more common in areas covered with dark lava flows. Scientists
believe that predation pressure results in this pattern. Fur color
is determined by a dominant black allele B and a recessive tan
allele b. Suppose a population of mice with a B allele frequency of
0.5 is relocated to a basalt flow. Selection occurs due to
predation, and the resulting breeding population has now produced
19 from tan mice, 117 from heterozygous black mice, and 61 from
homozygous black mice. Calculate the selection coefficient, s, of
tan mice after selection has occurred. Express your answer to at
least two decimal places.