In the family tree people with recessive trait of attached earlobes are shredded gray?

In a family tree, individuals with the recessive trait of attached earlobes are typically represented in gray to indicate that they express this trait, which requires two copies of the recessive allele. In contrast, individuals with free-hanging earlobes, a dominant trait, would be represented in a different color, such as black. This visual representation helps to easily identify the inheritance patterns of the traits within the family. Consequently, tracing the gray individuals can provide insights into the genetic makeup of the family regarding the earlobe trait.