Answer:
16
Explanation:
By using the law of independent assortment, you can solve this by calculating

however, crossover can cause endless possibilities of genotypes!
Mutations also occur because of incorrect copying of information in Mitosis.
The answer is C. The dark moths were best fit for their environment, since the trees in England were darker due to pollution. The dark moths could best blend into the trees, so birds couldn’t spot them. The white moth population decreased dramatically because they could not blend in with the trees, so they were spotted easier and were thus more vulnerable to predation. This illustrates Darwin’s concept of survival of the fittest. The organisms best fit for the environment live because they have traits and adaptations that enable them to survive. The organisms that do not have these traits, however, will not survive. Since the fit organisms live, they can reproduce and pass on their fitness to their offspring. That’s what makes a species stronger and less vulnerable in their environment. This leads to evolution.
Clostridium, Bacteroides, and the methane-producing archaea (methanogens), are called obligate anaerobes because their energy-generating metabolic processes are not coupled with the consumption of oxygen.