Final answer:
Analyzing multiple generations is the recommended approach to address questions related to family pedigrees, as it helps identify patterns of inheritance and the prevalence of specific gene mutations, including heterozygous and homozygous traits.
Step-by-step explanation:
When addressing questions related to family pedigrees, the recommended approach is c) Analyze multiple generations. By examining several generations, we can identify patterns of inheritance and potentially determine whether traits are dominant or recessive. Pedigrees can help us understand the likelihood of an individual carrying a specific gene mutation, even if they do not exhibit the trait themselves. It is also important to analyze individuals who are heterozygous or homozygous for a trait. This comprehensive analysis may explain why someone like Rebecca's mother does not have a BRCA gene mutation while other family members do. Additionally, the prevalence of certain gene mutations in specific ethnic groups can be attributed to founder effects, genetic drift, and population bottlenecks that increase the frequency of these mutations within the group.