The most likely traits for Tad based on his parents' characteristics are dark hair and no dimples.
Dark hair and no dimples are the most likely traits for Tad. This is because the presence of blonde hair and dimples in the parents does not guarantee those traits in the offspring due to the inheritance of genes.
Genetic traits, such as dimples, follow specific inheritance patterns. In this case, the combination of parents' traits suggests that Tad is more likely to inherit the traits of dark hair and no dimples.
The phenotype of a person is influenced by both genetic and environmental factors, which can lead to variations even within families. Hence, despite the parents' traits, Tad's traits are not predetermined but influenced by genetic chance.
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