What is the most likely outcome of a mutation in genes affecting coat color in deer?

The most likely outcome of a mutation in genes affecting coat color in deer is an increase in coat-color diversity in the population. Mutations introduce new genetic variations, which can lead to different phenotypes, such as variations in coat color. This diversification can enhance the adaptability of the population, allowing some individuals to better survive in their specific environments due to new coat color traits that may offer improved camouflage or thermoregulation.

As coat-color diversity increases, some individuals may possess coat colors that are more advantageous in particular habitats or seasons, which can further influence survival and reproductive success. Over time, this increased diversity may enable the population to cope better with environmental changes and predator pressures.

The other choices relate to potential impacts of mutations but do not directly address the primary and immediate result of genetic change in coat color among the deer. Changes in selection pressures or adaptations in predator species and the number of genes for coat color could result from this diversity but are not the direct outcomes of the mutations themselves.