You are studying a population of mice that fall into two size classes: small and large. You are curious if mouse size is under s
election. You count the number of offspring born to small and large parents. Your results show that small parents have on average 6.2 offspring and large parents have 6.25 offspring. Does size seem to be under selection
The information is not sufficient to support this asumption
Explanation:
To unequivocally determine the existence of selection acting on this trait (size), it is necessary to carry out an experiment in which the sample size should be statistically significant (N sample for each group > 50). Moreover, it is also important to include negative controls (i.e., individuals with an average size between both groups) in the experiment.
Explanation: The random change in the gene pool is due to genetic drift. Remember, genetic drift occurs at a more rapid rate when the population size is reduced. The flood is a random occurrence. It could have as easily been a drought.
